Bisstyryl compound and the electrophotographic photoreceptors relating thereto

ABSTRACT

An electrophotographic photoreceptors containing a bisstyryl compound represented by the following formula I is disclosed.   &lt;IMAGE&gt; Formula I  R0 and/or R00 represent methyl group, and the rest of Rs represent hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and Ar1 and Ar2 represent each an aromatic group.

FIELD OF THE INVENTION

This invention relates to a bisstyryl compound and the electrophotographic photoreceptors relating thereto and, particularly, to the bisstyryl compound suitable for a carrier transporting material in an electrophotographic photoreceptor comprising a photoreceptive layer containing a carrier generating material and the carrier transporting material.

BACKGROUND OF THE INVENTION

As for an electrophotographic photoreceptor, those containing each an inorganic photoconductor such as selenium, zinc oxide, cadmium sulfide and silicon as the principal component have heretofore been widely known. However, their characteristics such as the thermal stability and durability thereof have not always been satisfactory and they have also had the problems of manufacture and handling.

On the other hand, the photoreceptors comprising each a photoreceptive layer containing an organic photoconductive compound as the principal component thereof are relatively easier for manufacture, inexpensive in cost, easier for handling and, generally, excellent in thermal stability as compared to a selenium photoreceptor. As for the organic photoconductive compounds, a poly-N-vinylcarbazole has been well-known. There have already been put to practical use the photoreceptors comprising each a photoreceptive layer containing an electric-charge transfer complex produced of the above-mentioned poly-N-vinylcarbazole and a Lewis acid such as 2,4,7-trinitro-9-fluorenone as the principal component thereof.

Further, on the other hand, there have also been known a photoreceptor comprising a laminated or single layered function-separated type photoreceptive layer in which the carrier generating function and carrier transporting function of the photoconductor thereof can be performed by separate materials, respectively. For example, there have already been put to practical use the photoreceptors comprising each a photoreceptive layer comprising a carrier generating layer formed of a thin amorphous selenium layer and a carrier transporting layer containing a poly-N-vinylcarbazole as the principal component thereof.

However, the above-mentioned poly-N-vinylcarbazole lacks a flexibility and the coated layer thereof is solid and fragile and is liable to be cracked or peeled off. Every photoreceptor applied therewith is, therefore, deteriorated in durability. When the above-mentioned defects are improved by adding a plasticizer, the residual potentials are increased in an electrophotographic process and are accumulated as in making repetition use so as to produce fogs increasingly, so that a copied image is spoiled.

A low-molecular organic photoconductive compound has generally no coated-layer forming function. Therefore, when the compound is used with a suitable binder in combination and the kinds and composite proportions of the binders are suitably selected, the compound is preferable from the viewpoint that the physical properties of the coated layer or the photoreceptive characteristics can each be controlled to some extent. However, there are some limitation to the kinds of the organic photoconductive compounds each having a relatively high compatibility with the binders. Actually, there are limited to the kinds of the binders applicable to form the photoreceptive layers of an electrophotographic photoreceptor.

For example, 2,5-bis(p-diethylaminophenyl)-1,3,4-oxadiazole described in U.S. Pat. No. 3,189,447 is low in compatibility with the binders commonly applicable as a material of the photoreceptive layers of an electrophotographic photoreceptor, such as a polyester and a polycarbonate. In other words, when a photoreceptive layer is formed by mixing them up in a proportion required for controlling the electrophotographic characteristics, the crystals of oxadiazole are deposited at a temperature of not lower than 50° C., so as to have a defect that the electrophotographic characteristics such as electric-charge coercive force and photoreceptivity deteriorate.

In the meanwhile, each of the diaryl alkane derivatives described in U.S. Pat. No. 3,820,989 has few problems of the compatibility with a binder. However, it is low in stability against light. When it is applied to a repetition-transfer type electrophotographic photoreceptor to which an electric-charge·an exposure are applied repeatedly, it has a defect that the photoreceptivity of the photoreceptive layer is gradually lowered.

In U.S. Pat. No. 3,274,000 and Japanese Patent Examined Publication No. 47-36428/1972, the different types of phenothiazine derivatives are described, respectively. However, every one of them has the defect that the photoreceptivities thereof are low and the stabilities thereof are also low in repetition use.

The stilbene compounds described in Japanese Patent Publication Open to Public Inspection (hereinafter referred to as JP OPI Publication) Nos. 58-65440/1983, 58-190953/1983 and 63-149652/1988 are each relatively excellent in electric-charge coercive force and photoreceptivity. However, they are still not satisfactory in durability in repetition use.

In the meanwhile, the photoreceptors capable of solving the above-mentioned defects include those applied with a distilbene compound as the carrier transporting material thereof, such as those described in JP OPI Publication Nos. 60-175052/1985, 60-174749/1985, 62-120346/1987, 64-32265/1989, 1-106069/1989, 1-93746/1989 and 1-274154/1989. However, they can still not be satisfactory in durability when they are incorporated into a copier or a printer and are used repeatedly.

Particularly, there have been the following for problems.

1) In a high-speed copier having a high linear velocity, a cycle of electric-charging·exposure·electric neutralization is shortened. Therefore, the residual potential is seriously raised in repetition copying operations;

2) When making use of a copier for repeating copying operations, a small white spotted image defect (that is so-called a white-dot) is produced in solid-black image areas;

3) When making use of a reversal development type printer, there found the defects that an exposure potential (VL) is raised at a low temperature and an electric-charge potential (VH) is lowered in repetition use; and

4) A small black-spotted image defect (that is so-called a black-dot) is liable to be produced in white image areas.

As described above, there has not been found any carrier transporting material having the characteristics which can be practical and satisfactory for providing an electrophotographic photoreceptor.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a compound suitable for a carrier transporting material for a highly photoreceptive and highly durable photoreceptor applicable to a copier or printer and the electrophotographic photoreceptors relating thereto.

The other objects of the invention are to provide the following (1) through (4);

(1) a compound suitable for a carrier generating material for a photoreceptor not raising any residual potential thereof even when repeating a series of electric-charging·exposure·electric neutralization operations, in a high-speed copier having a high linear velocity, and the electrophotographic photoreceptors relating thereto;

(2) a compound suitable for a carrier transporting material for a photoreceptor not producing any small white-spotted image defect (that is so-called a white-dot) in the solid-black image areas even in repetition use, when the photoreceptor is incorporated into a copier, and the electrophotographic photoreceptors relating thereto;

(3) a compound suitable for a carrier generating material for a photoreceptor neither raising an exposure potential (VL) at a low temperature even in repetition use, nor lowering an electric-charge potential (VH) even in repetition use, in the case where the photoreceptor is incorporated into a reversal development type printer, and the electrophotographic photoreceptors relating thereto; and

(4) a compound suitable for a carrier transporting material for a photoreceptor not producing any small black-spotted image defect (that is so-called a black-dot) in the white image areas, and the electrophotographic photoreceptors relating thereto.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the IR spectra of an example of the carrier transporting materials relating to the invention;

FIG. 2 is the IR spectra of another example of the carrier transporting materials relating to the invention;

FIG. 3 is the IR spectra of a further example of the carrier transporting materials relating to the invention;

FIG. 4 is the IR spectra of a still further example of the carrier transporting materials relating to the invention;

FIG. 5 is the IR spectra of a yet another example of the carrier transporting materials relating to the invention;

FIG. 6 is the cross-sectional view of an example of the electrophotographic photoreceptors relating to the invention;

FIG. 7 is the cross-sectional view of another example of the electrophotographic photoreceptors relating to the invention;

FIG. 8 is the cross-sectional view of a further example of the electrophotographic photoreceptors relating to the invention;

FIG. 9 is the cross-sectional view of a still further example of the electrophotographic photoreceptors relating to the invention;

FIG. 10 is the cross-sectional view of a yet another example of the electrophotographic photoreceptors relating to the invention;

FIG. 11 is the cross-sectional view of another example of the electrophotographic photoreceptors relating to the invention;

Wherein, reference numeral

1: a support

2: a carrier generating layer

3: a carrier transporting layer

5: an interlayer

6: a layer containing a carrier generating material and a carrier transporting material

DETAILED DESCRIPTION OF THE INVENTION

This invention relates to the bisstyryl compounds represented by the following Formula [I] and to the electrophotographic photoreceptors each containing the above-mentioned bisstyryl compound. ##STR2## wherein R¹, R², R³ and R⁴ represent each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms;

Ar¹ and Ar² represent each ##STR3## wherein R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, R²² and R²³ represent each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a halogenated alkyl group having 1 to 4 carbon atoms, a halogen atom, ##STR4## wherein R²⁴ and R²⁵ represent each an alkyl group, an aralkyl group or a phenyl group, --OR²⁶ wherein R²⁶ represents an alkyl group, an aralkyl group or a phenyl group, a hydroxyl group, an aralkyl group, a phenyl group, --R²⁷ COOR²⁸ wherein R²⁷ represents an alkylene group and R²⁸ represents an alkyl group, --COOR²⁹ wherein R²⁹ represents an alkyl group, --R³⁰ OCOR³¹ wherein R³⁰ represents an alkylene group and R³¹ represents an alkyl group, or --OCOR³² wherein R³² represents an alkyl group; provided, Ar¹ and Ar² shall not represent each ##STR5## (non-substituted) at the same time, and when Ar¹ represents ##STR6## (wherein R and R' represents each an alkyl group having 1 to 4 carbon atoms), n is 1, m is 1 or 0. Regarding Ar¹ and Ar², a preferred combination is that Ar¹ represents a phenyl group substituted with an alkyl group having 1 to 4 carbon atoms and Ar² represents a non-substituted phenyl group. More preferably, Ar¹ is a substituted with a methyl group, and most preferably is a para-methyl group. ##STR7## wherein R¹, R² and R³ represent each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, Ar¹ and Ar² represent each ##STR8## wherein R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹ and R²² represent each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a halogenated alkyl group having 1 to 4 carbon atoms, a halogen atom, ##STR9## wherein R²³ and R²⁴ represent each an alkyl group, an aralkyl group or a phenyl group, --OR²⁵ wherein R²⁵ represents an alkyl group, an aralkyl group or a phenyl group, a hydroxyl group, an aralkyl group, a phenyl group, --R²⁶ COOR²⁷ wherein R²⁶ represents an alkylene group and R²⁷ represents an alkyl group, --COOR²⁸ wherein R²⁸ represents an alkyl group, --R²⁹ OCOR³⁰ wherein R²⁹ represents an alkylene group and R³⁰ represents an alkyl group, or --OCOR³¹ wherein ³¹ represents an alkyl group; provided, when Ar¹ represents ##STR10## (wherein R and R' represent each an alkyl group having 1 to 4 carbon atoms), n is 0 or 1 and m is 0 or 1. Preferably, n is 0 and m is 0.

Further, this invention is to provide the bisstyryl compounds represented by the following Formula [III] and the electrophotographic photoreceptors containing the bisstyryl compounds. ##STR11## wherein R¹ represents an alkyl group having 1 to 4 carbon atoms, Ar¹ and Ar² represent each ##STR12## wherein R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹ and R²⁰ represent each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a halogenated alkyl group having 1 to 4 carbon atoms, a halogen atom, ##STR13## wherein R²¹ and R²² represent each an alkyl group, an aralkyl group or a phenyl group, --OR²³ wherein R²³ represents an alkyl group, an aralkyl group or a phenyl group, a hydroxyl group, an aralkyl group, a phenyl group, --R²⁴ COOR²⁵ wherein R²⁴ represents an alkylene group and R²⁵ represents an alkyl group, --COOR²⁶ wherein R²⁶ represents an alkyl group, --R²⁷ OCOR²⁸ wherein R²⁷ represents an alkylene group and R²⁸ represents an alkyl group, or --OCOR²⁹ wherein R²⁹ represents an alkyl group; provided, Ar¹ and Ar² shall not represent each ##STR14## (non-substituted), at the same time, and when Ar¹ represents ##STR15## R and/or R' represent each the substituent represented by the above-denoted R², R³, R⁴, R⁵ or R⁶, and when R and R' represent each an alkyl group having 1 to 4 carbon atoms, n is 1 and m is 0 or 1. Regarding Ar¹ and Ar², a preferred combination is that Ar¹ represents a phenyl group substituted with an alkyl group having 1 to 4 carbon atoms and Ar² represents a non-substituted phenyl group. More preferably, Ar¹ is a substituted with a methyl group, and most preferably is a para-methyl group.

The above-mentioned substituents for the compounds of the invention represented by the above-given formulas include, for example, an alkyl group such as those of methyl, ethyl, propyl and butyl; an alkoxy group such as those of methoxy, ethoxy and propoxy; a halogen atom such as those of fluorine, chlorine and iodine; a dialkylamino group such as those of diethylamine; a diaralkylamino group such as those of diethylphenylamine; a diallylamino group such as those of diphenylamine; a diarylamino group; an ester group such as those of oxycarbonylmethyl; a phenoxy group; a phenyl group; a cyano group; an acyl group such as those of carbonylethyl; a hydroxy group; and a trifluoromethyl group.

Ar¹ and Ar² in the formulae I, II and III, preferably are phenyl groups. And when it is substituted, the substituent preferably is a methyl group.

The compounds of the invention represented by the above-given Formulas [I], [II] and [III] are each characterized in the following features (A) through (C) and are each suitable for the carrier transporting materials of an electrophotographic photoreceptor.

(A) The photoreceptivity and durability can be improved, because the compounds are bisstyryl compounds each having a substituent in the molecules thereof. When the electrophotographic photoreceptor is incorporated into a copier or a printer and is then used repeatedly therein, an excellent image can be provided without producing any image defect and any image failure, such as white-dots, black-dots, fog and density lowering, because the electric-charge potential variations can be reduced;

(B) When it is incorporated into a high-speed copier or printer and is then used repeatedly, an excellent image can be provided without producing any image defect or image failure, because the residual potential thereof can also be reduced;

(C) The synthesis thereof can also be easier, because it is a bisstyryl compound.

The typical compounds of the invention Nos. 1 through 87 will be collectively exemplified later.

Next, the synthesis examples of the compounds represented by Formula [I] will now be detailed. The outlines of the synthesis formula will also be given below.

Synthesis Example 1: Synthesis of Exemplified Compound No.6

Formyl substance 3 was synthesized in the known procedures.

Potassium carbonate (manufactured by Kanto Chemical Co.) (in a mol ratio of 2) and copper powder (manufactured by Kanto Chemical Co.) (in a mol ratio of 0.2) were added into 2,4-dimethyl aniline (manufactured by Aldrich Co.) 1 (in a mol ratio of 1) and iodobenzene (manufactured by Tokyo Kasei Co.) (in a mol ratio of 2.5), and the resulting mixture was reacted at an internal temperature within the range of 190° to 210° C. for 50 hours. After the resulting reactant was after-treated and then column-refined, 2,4-dimethyl triphenyl amine 2 was obtained in a yield of 80%, (in Ullmann's reaction).

N,N-dimethyl formamide (manufactured by Kanto Chemical Co.) (in a mol ratio of 4) and phosphorus oxychloride (manufactured by Wako Junyaku Ind. Co.) (in a mol ratio of 3) were added into 2,4-dimethyl triphenyl amine 2 (in a mol ratio of 1), and the resulting mixture was reacted at an internal temperature within the range of 70° to 90° C. for 24 hours. After the resulting reactant was after-treated and then column-refined, N,N-bis(4-formyl-phenyl)-2,4-dimethyl aniline 3 was obtained in a yield of 60%, (in Wilsmyer's reaction).

Diethyl phosphonate substance 7 was synthesized in the known procedures. 4-methyl benzophenone (manufactured by Aldrich Co.) 4 (in a mol ratio of 1) was added into methanol (manufactured by Kanto Chemical Co.) and sodium bolohydride (manufactured by Kanto Chemical Co.) (in a mol ratio of 0.5) was then added thereinto. The resulting mixture was reacted at an internal temperature within the range of 10° to 20° C. for 5 hours. After the resulting reactant was after-treated and then column-refined, hydroxy substance 5 was obtained in a yield of 95%, (in a reduction reaction).

Hydroxy substance 5 (in a mol ratio of 1) was added into toluene (manufactured by Wako Junyaku Ind. Co.) (in a mol ratio of 1.2). The resulting mixture was reacted at an internal temperature within the range of 10° to 20° C. for 2 hours. After the resulting reactant was after-treated, chlor substance 6 was obtained in a yield of 95%, (in a substitution reaction).

Triethyl phosphite (manufactured by Kanto Chemical Co.) (in a mol ratio of 1.2) was added into chlor substance 6 (in a mol ratio of 1). The resulting mixture was reacted at an internal temperature within the range of 140° to 160° C. for 10 hours. After the resulting reactant was after-treated and then distillation-refined, diethyl phosphonate substance 7 was obtained in a yield of 93%, (in a diethyl phosphonate reaction).

A carrier transporting material (hereinafter abbreviated to as CTM) was synthesized by making use of the compounds obtained in the above-described procedures as the raw materials thereof.

N,N-bis(4-formyl-phenyl)-2,4-dimethyl aniline 3 of 10 g (in 0.033 mols) and 1-(4-methyl-phenyl)-1-phenyl-diethyl methyl phosphonate 7 of 21 g (in 0.066 mols) were dissolved in toluene (manufactured by Wako Junyaku Ind. Co.) of 50 ml. Sodium methoxide (manufactured by Kanto Chemical Co.) of 3.6 g (in 0.0660 mols) was added into toluene of 50 ml and the resulting mixed solution was added into the former solution while keeping an internal temperature of not higher than 25° C. with cooling them with ice. After that, the resulting mixture was stirred at room temperature for 3 hours. Then, 100 ml of water was added thereinto, and the resulting toluene layer was washed. The remaining water was removed from the toluene layer with the use of sodium sulfate (manufactured by Kanto Chemical Co.) and the solvents were distilled off. After the resulting residuals were column-refined with silica, the objective exemplified compound No. 6 of 16 g (in 0.023 mols) in the form of yellow-white crystals was obtained in a yield of 71%.

The melting point thereof was within the range of 100° to 114° C. and the elementary analyzed value thereof was a follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%)                                                                          91.10     6.71       2.10                                         Calculated value (%):                                                                       91.27     6.60       2.13                                         ______________________________________                                    

IR data of No.6 (for the spectra thereof, refer to FIG. 1) 1500 cm⁻¹ /S (Strong: and so forth).

Synthesis Example 2: Synthesis of Exemplified Compound No. 3

Exemplified compound No. 3 of 17.4 g (in 0.026 mols) in the form of yellow-white crystals was obtained in a yield of 80% in the same manner as in Synthesis Example 1, except that 2,4-dimethyl triphenyl amine used in Synthesis Example 1 was replaced by 2,3-dimethyl triphenyl amine.

The melting point thereof was within the range of 102° to 110° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.12     6.80       2.05                                         Calculated value (%):                                                                       91.27     6.60       2.13                                         ______________________________________                                    

IR data of No.3 (for the spectra thereof, refer to FIG. 2) 1500 cm⁻¹ /S,

Synthesis Example 3: Synthesis of Exemplified Compound No.2

Exemplified compound No.2 of 16.5 g (in 0.025 mols) in the form of yellow-white crystals was obtained in a yield of 82% in the same manner as in Synthesis Example 1, except that 2,4-dimethyl triphenyl amine and 4-methyl benzophenone used in Synthesis Example 1 were replaced by 2,3-dimethyl triphenyl amine and 3-methyl benzophenone, respectively.

The melting point thereof was within the range of 108° to 115° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.09     6.70       2.07                                         Calculated value (%):                                                                       91.27     6.60       2.13                                         ______________________________________                                    

Synthesis Example 4: Synthesis of Exemplified Compound No.9

Exemplified compound No.9 of 16.8 g (in 0.026 mols) in the form of yellow-white crystals was obtained in a yield of 80% in the same manner as in Synthesis Example 1, except that 2,4-dimethyl aniline used in Synthesis Example 1 was replaced by 2,5-dimethyl dimethyl aniline.

The melting point thereof was within the range of 102° to 105° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.05     6.81       1.95                                         Calculated value (%):                                                                       91.27     6.60       2.13                                         ______________________________________                                    

Synthesis Example 5: Synthesis of Exemplified Compound No.10

Exemplified compound No.10 of 12.4 g (in 0.019 mols) in the form of yellow-white crystals was obtained in a yield of 57% in the same manner as in Synthesis Example 1, except that 4-methyl benzophenone and 2,4-dimethyl aniline each used in Synthesis Example 1 were replaced by 2-methyl benzophenone and 2,6-dimethyl aniline, respectively.

The melting point thereof was within the range of 100° to 103° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.18     6.65       2.10                                         Calculated value (%):                                                                       91.27     6.60       2.13                                         ______________________________________                                    

Next, the typical compounds No.(1) through No.(70) represented by Formula [II] will be collectively exemplified later.

The synthesis examples of the compounds represented by Formula [II] will now be detailed.

Synthesis Example 6: Synthesis of Exemplified Compound No.(22)

Exemplified compound No.(22) of 22 g (in 0.026 mols) in the form of yellow-white crystals was obtained in a yield of 79% in the same manner as in Synthesis Example 1, except that 2,4-dimethyl triphenyl amine and 1-(4-methyl-phenyl)-1-phenyldiethyl methylphosphonate each used in Synthesis Example 1 were replaced by 2,3,6-trimethyl-triphenyl amine and dinaphthyl-diethyl methyl phosphonate, respectively.

The melting point thereof was within the range of 157° to 159° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         92.245    5.973      1.687                                        Calculated value (%):                                                                       92.489    5.851      1.659                                        ______________________________________                                    

Synthesis Example 7: Synthesis of Exemplified Compound No.(53)

Exemplified compound No.(53) of 18 g (in 0.025 mols) in the form of yellow-white crystals was obtained in a yield of 76% in the same manner as in Synthesis Example 1, except that 2,4-dimethyl triphenyl amine and 1-(4-methyl-phenyl)-1-phenyldiethyl methyl phosphonate each used in Synthesis Example 1 were replaced by 2,4,6-trimethyl-triphenyl amine and 1-(4-chloro-phenyl)-1-phenyl-diethyl methyl phosphonate, respectively.

The melting point thereof was within the range of 138° to 141° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         82.614    5.537      1.902                                        Calculated value (%):                                                                       82.572    5.471      1.965                                        ______________________________________                                    

Synthesis Example 8: Synthesis of Exemplified Compound No. (11)

Exemplified compound No.11 of 14.8 g (in 0.023 mols) in the form of yellow-white crystals was obtained in a yield of 70% in the same manner as in Synthesis Example 1, except that 2,4-dimethyl triphenyl amine and 1-(4-methyl-phenyl)-1-phenyl-diethyl methyl phosphonate each used in Synthesis Example 1 were replaced by 2,4,6-trimethyl-triphenyl amine and diphenyl-diethyl methyl phosphonate, respectively.

The melting point thereof was within the range of 174° to 177° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.270    6.627      2.098                                        Calculated value (%):                                                                       91.405    6.409      2.175                                        ______________________________________                                    

IR data of No.(11) (for the spectra thereof, refer to FIG. 3) 1500 cm⁻¹ :S.

Synthesis Example 9: Synthesis of Exemplified Compound No.(14)

Exemplified compound No.(14) of 14.1 g (in 0.021 mols) in the form of yellow-white crystals was obtained in a yield of 64% in the same manner as in Synthesis Example 8, except that diphenyl-diethyl methyl phosphonate used in Synthesis Example 8 was replaced by 1-(4-methyl-phenyl)-1-phenyl-diethyl methyl phosphonate.

The melting point thereof was within the range of 121° to 125° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.197    6.823      2.008                                        Calculated value (%):                                                                       91.165    6.751      2.085                                        ______________________________________                                    

IR data of No.(11) (for the spectra thereof, refer to FIG. 4) 1500 cm⁻¹ : S.

Synthesis Example 10: Synthesis of Exemplified Compound No.(1)

Exemplified compound No.(1) of 12.2 g (in 0.019 mols) in the form of yellow-white crystals was obtained in a yield of 58% in the same manner as in Synthesis Example 8, except that N,N-bis-(4-formyl-phenyl)-2,4,6-trimethyl amine (corresponding to 3 of Synthesis Example 1) used in Synthesis Example 8 was replaced by N,N-bis-(4-formyl-phenyl)-2,3,6-trimethyl amine.

The melting point thereof was within the range of 122° to 125° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.267    6.535      2.198                                        Calculated value (%):                                                                       91.405    6.409      2.175                                        ______________________________________                                    

Synthesis Example 11: Synthesis of Exemplified Compound No.(20)

Exemplified compound No.(20) of 14.7 g (in 0.021 mols) in the form of yellow-white crystals was obtained in a yield of 64% in the same manner as in Synthesis Example 8, except that diphenyl-diethyl methyl phosphonate used in Synthesis Example 8 was replaced by di(4-methyl-phenyl)-diethyl methylphosphonate.

The melting point thereof was within the range of 169° to 173° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         90.877    7.149      1.983                                        Calculated value (%):                                                                       90.943    7.056      2.001                                        ______________________________________                                    

Next, the typical compounds No. [1] through [155] represented by Formula [III] will be collectively exemplified later.

The synthesis examples of the compounds represented by Formula [III] will now be detailed.

Synthesis Example 12: Synthesis of Exemplified Compound No.[21]

Exemplified compound No.[21] of 13.1 g (in 0.020 mols) in the form of yellow-white crystals was obtained in a yield of 60% in the same manner as in Synthesis Example 1, except that N,N-bis(4-formyl-phenyl)-2,4-dimethyl amine used in Synthesis Example 1 was replaced by N,N-bis(4-formyl-phenyl)-4-ethyl aniline.

The melting point thereof was within the range of 94° to 100° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.2828   6.5880     2.1281                                       Calculated value (%):                                                                       91.2831   6.5879     2.1290                                       ______________________________________                                    

IR data of No.[21] (for the spectra thereof, refer to FIG. 5).

Synthesis Example 13: Synthesis of Exemplified Compound No.[3]

Exemplified compound No.[3] of 17.7 g (in 0.027 mols) in the form of yellow-white crystals was obtained in a yield of 70% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by o-ethyl aniline.

The melting point thereof was within the range of 90° to 93° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.2833   6.5876     2.1281                                       Calculated value (%):                                                                       91.2831   6.5879     2.1290                                       ______________________________________                                    

Synthesis Example 14: Synthesis of Exemplified Compound No.[12]

Exemplified compound No.[12] of 16.4 g (in 0.025 mols) in the form of yellow-white crystals was obtained in a yield of 65% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by m-ethyl aniline.

The melting point thereof was within the range of 93° to 98° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.2829   6.5878     2.1293                                       Calculated value (%):                                                                       91.2831   6.5879     2.1290                                       ______________________________________                                    

Synthesis Example 15: Synthesis of Exemplified Compound No.[30]

Exemplified compound No.[30] of 18.8 g (in 0.028 mols) in the form of yellow-white crystals was obtained in a yield of 85% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by o-n-propyl aniline.

The melting point thereof was within the range of 91° to 94° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1644   6.7508     2.0850                                       Calculated value (%):                                                                       91.1651   6.7504     2.0846                                       ______________________________________                                    

Synthesis Example 16: Synthesis of Exemplified Compound No. [39]

Exemplified compound No.[39] of 14.1 g (in 0.021 mols) in the form of yellow-white crystals was obtained in a yield of 63% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by m-n-propyl aniline.

The melting point thereof was within the range of 87° to 92° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1653   6.7481     2.0832                                       Calculated value (%):                                                                       91.1651   6.7504     2.0846                                       ______________________________________                                    

Synthesis Example 17: Synthesis of Exemplified Compound No.[48]

Exemplified compound No.[48] of 17.5 g (in 0.026 mols) in the form of yellow-white crystals was obtained in a yield of 79% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by p-n-propyl aniline.

The melting point thereof was within the range of 89° to 92° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1629   6.7511     2.0821                                       Calculated value (%):                                                                       91.1651   6.7504     2.0846                                       ______________________________________                                    

Synthesis Example 18: Synthesis of Exemplified Compound No.[57]

Exemplified compound No.[57] of 13.4 g (in 0.020 mols) in the form of yellow-white crystals was obtained in a yield of 61% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by o-isopropyl aniline.

The melting point thereof was within the range of 88° to 90° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1659   6.7481     2.0836                                       Calculated value (%):                                                                       91.1651   6.7504     2.0846                                       ______________________________________                                    

Synthesis Example 19: Synthesis of Exemplified Compound No.[66]

Exemplified compound No.[66] of 14.1 g (in 0.021 mols) in the form of yellow-white crystals was obtained in a yield of 64% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by m-isopropyl aniline.

The melting point thereof was within the range of 93° to 99° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1593   6.7421     2.0799                                       Calculated value (%):                                                                       91.1651   6.7504     2.0846                                       ______________________________________                                    

Synthesis Example 20: Synthesis of Exemplified Compound No [75]

Exemplified compound No.[75] of 18.1 g (in 0.027 mols) in the form of yellow-white crystals was obtained in a yield of 82% in the same manner as in Synthesis Example 12, except that p-ethyl aniline used in Synthesis Example 12 was replaced by p-isopropyl aniline.

The melting point thereof was within the range of 95° to 102° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1623   6.7488     2.0841                                       Calculated value (%):                                                                       91.1651   6.7504     2.0846                                       ______________________________________                                    

Synthesis Example 21: Synthesis of Exemplified Compound No.[24]

Exemplified compound No.[24] of 15.1 g (in 0.022 mols) in the form of yellow-white crystals was obtained in a yield of 66% in the same manner as in Synthesis Example 12, except that 4-methyl benzophenone used in Synthesis Example 12 was replaced by 4,4'-dimethyl benzophenone.

The melting point thereof was within the range of 112° to 116° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.1010   6.9008     2.0311                                       Calculated value (%):                                                                       91.0519   6.9062     2.0419                                       ______________________________________                                    

Synthesis Example 22: Synthesis of Exemplified Compound No.[60]

Exemplified compound No.[60] of 16.8 g (in 0.024 mols) in the form of yellow-white crystals was obtained in a yield of 73% in the same manner as in Synthesis Example 12, except that p-ethyl aniline and 4-methyl benzophenone each used in Synthesis Example 12 were replaced by o-isopropyl aniline and 4,4'-dimethyl benzophenone, respectively.

The melting point thereof was within the range of 109° to 115° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         90.8      7.03       2.0100                                       Calculated value (%):                                                                       90.9432   7.0558     2.0010                                       ______________________________________                                    

Synthesis Example 23: Synthesis of Exemplified Compound No. [136]

Exemplified compound No.[136] of 16.1 g (in 0.024 mols) in the form of yellow-white crystals was obtained in a yield of 74% in the same manner as in Synthesis Example 12, except that 4-methyl benzophenone used in Synthesis Example 12 was replaced by 4-ethyl benzophenone.

The melting point thereof was within the range of 112° to 118° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         91.10     6.90       2.00                                         Calculated value (%):                                                                       91.05     6.9062     2.042                                        ______________________________________                                    

Synthesis Example 24: Synthesis of Exemplified Compound No.[140]

Exemplified compound No.[140] of 14.9 g (in 0.022 mols) in the form of yellow-white crystals was obtained in a yield of 68% in the same manner as in Synthesis Example 12, except that 4-methyl benzophenone used in Synthesis Example 12 was replaced by 4-bromo benzophenone.

The melting point thereof was within the range of 121° to 124° C. and the elementary analyzed value thereof was as follows.

    ______________________________________                                                    C (carbon)                                                                             H (hydrogen)                                                                              N (nitrogen)                                     ______________________________________                                         Measured value (%):                                                                         73.12     4.74       1.71                                         Calculated value (%):                                                                       73.19     4.73       1.77                                         ______________________________________                                    

When an electrophotographic photoreceptor contains the compound represented by the afore-given Formulas [I] through [III] as the carrier transporting material, they may have the configurations shown in FIGS. 6 through 11.

In FIGS. 6 and 7, to be more concrete, electroconductive support 1 is provided thereonto with photoreceptive layer 4 comprising carrier generating layer 2 containing a carrier generating material as the principal component thereof and carrier transporting layer 3 containing a carrier transporting material relating to the invention as the principal component thereof.

Photoreceptive layer 4 may also be interposed between electroconductive support 1 and interlayer 5 provided onto the support 1.

When photoreceptive layer 4 has a double-layered structure as mentioned above, a photoreceptor having excellent electrophotographic characteristics can be prepared.

In the invention, as shown in FIGS. 10 and 11, it is also allowed that electroconductive support 1 may be provided thereonto, directly or through interlayer 5 with photoreceptive layer 4 comprising layer 6 containing a carrier transporting material as the principal component thereof and dispersed therein with a carrier generating material.

In the invention, as indicated by the imaginary line shown in FIG. 9, protective layer 7 may also be provided as the outermost layer.

A photoreceptive layer is formed of various combinations of binders, because the compounds of the invention represented by Formulas [I] through [III] lack a coat-forming function in themselves.

Any desired binders can be used as the above-mentioned binders. Among them, it is preferable to use a high-molecular polymers having a hydrophobic property, a high permittivity and an electric-insulating film-forming property.

The above-mentioned high-molecular polymers include, for example, the following polymers. There is, however, no limitation thereto.

(P-1) polycarbonate

(P-2) polyester

(P-3) methacrylic resin

(P-4) acrylic resin

(P-5) polyvinyl chloride

(P-6) polyvinylidene chloride

(P-7) polystyrene

(P-8) polyvinyl acetate

(P-9) a styrene-butadiene copolymer

(P-10) a vinylidene chloride-acrylonitrile copolymer

(P-11) a vinyl chloride-vinyl acetate copolymer

(P-12) a vinyl chloride-vinyl acetate-maleic anhydride copolymer

(P-13) silicone resin

(P-14) silicone-alkyd resin

(P-15) phenol formaldehyde resin

(P-16) styrene-alkyd resin

(P-17) poly-N-vinyl carbazole

(P-18) polyvinyl butyral

(P-19) polyvinyl formal

The above-given binder resins may be used independently or in combination in the forms of the mixtures thereof.

There is no special limitation to the CTMs applicable to the invention in combination. Among them, the examples thereof include the following compounds; namely, an oxazole derivative, an oxadiazole derivative, a thiazole derivative, a thiadiazole derivative, a triazole derivative, an imidazole derivative, an imidazolone derivative, an imidazolidine derivative, a bisimidazolidine derivative, a styryl compound, a hydrazone compound, a pyrazoline derivative, an amine derivative, an oxazolone derivative, a benzothiazole derivative, a benzoimidazole derivative, a quinazoline derivative, a benzofran derivative, an acridine derivative, a phenazine derivative, an aminostilbene derivative, a poly-N-vinylcarbazole, a poly-1-vinylpyrene and a poly-9-vinylanthracene.

The CTMs applicable to the invention include, preferably, those excellent in transporting function for a hole produced by irradiating light and suitable for a combination thereof with a later-described organic pigment applicable to the invention.

The carrier generating materials applicable to the carrier generating layers of the photoreceptive layers relating to the invention include, for example, the following materials.

(1) Azo type dyes such as a monoazo dye, a bisazo dye and a trisazo dye;

(2) Perylene type dyes such as a perylenic anhydride and perylenic imide;

(3) Indigo type dyes such as an indigo and a thioindigo;

(4) Polycyclic quinones such as an anthraquinone, a pyrene quinone and a flavanthrone;

(5) Quinacrydone type dyes;

(6) Bisbenzoimidazole type dyes;

(7) Indanthrone type dyes;

(8) Squarylium type dyes;

(9) Cyanine type dyes;

(10) Azulenium type dyes;

(11) Triphenyl methane type dyes;

(12) Amorphous silicon;

(13) Phthalocyanine type pigments such as a metal phthalocyanine and a non-metal phthalocyanine;

(14) Selenium, selenium-tellurium and selenium-arsenic;

(15) AdS and AdSe; and

(16) Pyrylium salt dyes and thiapyrylium salt dyes.

The above-given carrier generating materials can be used not only independently but also in combination in the forms of the mixtures thereof.

The electrophotographic photoreceptors relating to the invention are preferable to be applied with organic type pigments such as a fluorenone type bisazo pigment, a fluorenylidene type bisazo pigment and a polycyclic quinone pigment, as the CGMs thereof. In particular, when applying the fluorenone type bisazo pigments represented by the later-given Formula [F₁ ], fluorenylidene type bisazo pigments or polycyclic quinone pigments to the invention, the remarkably improved effects of photoreceptivity and durability can be displayed.

The typical examples [F₁ -1 through F₁ -24] of the fluorenone type bisazo pigments applicable to the invention will be given later. It is, however, to be understood that the invention shall not be limited thereto.

The fluorenone type bisazo pigments represented by the later-given Formula [F₁ ] which are applicable to the invention can be synthesized in any well-known processes including, for example, the processes described in Japanese Patent Application No. 62-304862/1987.

The fluorenylidene type bisazo pigments applicable to the invention are represented by the later-given Formula [F₂ ].

The typical examples of the bisazo pigments represented by Formula [F₂ ], which are effectively applicable to the invention, may include, for example, those represented by the chemical structures [F₂ -1] through [F₂ -7] which will be given later. It is, however, to be understood that the bisazo pigments applicable to the invention shall not be limited thereto.

The polycyclic quinone pigments applicable to the invention are represented by Formulas [Q₁ ] through [Q₃ ] which will be given later.

The typical examples of the polycyclic quinone pigments represented by later-given Formulas [Q₁ ] through [Q₃ ], which are applicable to the invention, will be given later. However, the invention shall not be limited thereto.

The typical examples of the anthanthrone pigments represented by Formula [Q₁ ] include those represented by the later-given formulas [Q₁ -1] through [Q₁ -6].

The typical examples of the dibenzypyrene quinone pigments represented by Formula [Q₂ ] include those represented by the later-given formulas [Q₂ -1] through [Q₂ -5].

The typical examples of the pyranthrone pigments represented by Formula [Q₃ ] include those represented by the later-given formulas [Q₃ -1] through [Q₃ -4].

The polycyclic quinone pigments represented by Formulas [Q₁ ] through [Q₃ ], which are applicable to the invention, can readily be synthesized in any well-known processes.

The non-metal phthalocyanine type pigments applicable to the invention include all the non-metal phthalocyanines each having photoconductivity and the derivatives thereof. For example, they include those of the α type, β type, τ and τ' type, η and η' type, X type and those having the crystal forms described in JP OPI Publication No. 62-103651/1987 and the derivatives thereof. Among them, those of the τ, X and K/R-X types are preferably used.

The X type non-metal phthalocyanines are described in U.S. Pat. No. 3,357,989 and the τ type non-metal phthalocyanines are described in JP OPI Publication No. 58-182639/1983.

As described in JP OPI Publication No. 62-103651/1987, the K/R-X type phthalocyanines are each characterized in having a principal peaks at a Bragg's angles (of 2θ±0.2°) of 7.7°, 9.2°, 16.8°,17.5°, 22.4° and 28.8° with respect to the X-rays of CuKα at 1.541 å, a peak intensity ratio within the range of 0.8 to 1.0 at 16.8° with respect to the peak intensity at 9.2° and a peak intensity ratio of not lower than 0.4 at 28.8° with respect to the peak intensity at 22.4°.

The oxytitanyl phthalocyanines applicable to the invention are each represented by the Formula [TP] which will be given later.

Those applicable to the invention include ones having different crystal forms, which are disclosed in the following patent publications, namely, JP OPI Publication Nos. 61-239248/1986, 62-272272/1987, 62-116158/1987, 64-17066/1989, 2-28265/1990 and 2-215866/1990.

The dispersion media for the organic type pigments applicable to the invention include, for example, the well-known dispersion media such as a methyl ethyl ketone.

In the invention, one or not less than two kinds of well-known electron-acceptant material can be contained in a photoreceptive layer. Such as electron-acceptant material as mentioned above is to be added in a proportion thereof to an organic type pigment applicable to the invention=0.01˜200:100 by weight and, preferably, 0.1˜100:100 by weight. And, the electron-acceptant material is to be added in a proportion thereof to whole CTM=0.01˜100:100 by weight and, preferably, 0.1˜50:100 by weight.

For the purpose of improving the electric-charge generating function of a carrier generating material (hereinafter abbreviated to as CGM), an organic amines can be added into a photoreceptive layer. Among these organic amines, secondary amines are preferable to be added thereto. These compounds are given in, for example, JP OPI Publication Nos. 59-218447/1984 and 62-8160/1987.

For the purpose of preventing deterioration by ozone, an antioxidant such as those given in JP OPI Publication No. 63-18354/1988 may be added in the photoreceptive layers. Such an antioxidant as mentioned above is to be added in an amount within the range of 0.1 to 100 parts by weight per 100 parts by weight of CTM, desirably, 1 to 50 parts by weight and, preferably 5 to 25 parts by weight.

Further, if required, for the purpose of protecting a photoreceptive layer, an UV absorbent may be added and a color-sensitivity correction dye may also be added.

An interlayer may be interposed between a photoreceptive layer and a support. The interlayer can function as an adhesion layer or a blocking layer.

In the invention, when a photoreceptive layer has a double-layered structure as shown in FIG. 6, a carrier generating layer (hereinafter abbreviated to as a CGL) can be formed, in the following method, directly over an electroconductive support or a carrier transporting layer (hereinafter abbreviated to as a CTL) or, if required, over an interlayer such as an adhesion layer or a blocking layer interposed therebetween.

(1) A vacuum-evaporation method;

(2) A method in which a solution prepared by dissolving a CGM in a suitable solvent is coated; and

(3) A method in which a dispersion solution prepared by making a CGM super-finely grained in a dispersion medium by making use of a ball-mill or a sand-grinder or, if required a dispersion solution prepared by mixedly dispersing a CGM with a binder in a dispersion medium.

To be more concrete, it is allowed to use any desired gas-phase segmentary methods such as a vacuum-evaporation method, a spattering method and a CVD method or any desired coating methods such as a dip-coating method, a spray-coating method, a blade-coating method and a roller-coating method.

The CGLs formed in the above-mentioned manner are each to have a thickness within the range of, desirably, 0.01 μm to 5 μm and, preferably, 0.05 μm to 3 μm.

The above-mentioned CTLs can also be formed in the same manner as in CGLs. The thickness of such a CTL may be so varied as to meet the requirements, however, it is usually within the range of, preferably, 5 μm to 60 μm.

The CTL is composed of a binder in a proportion within the range of, preferably, 1 to 5 parts by weight per one part by weight of the CTM of the invention. When forming photoreceptive layer 4 in which a finely grained CGM is dispersed, it is preferred to use a binder in a proportion of not more than 5 parts by weight to one part by weight of CGM.

When composing a CGL dispersed in a binder, it is preferred to use the binder in a proportion of not more than 5 parts by weight to one part by weight of CGM.

The electrophotographic photoreceptors relating to the invention have each the above-described composition. Therefore, as is apparent from the examples given later, they are excellent in electric-charging characteristics, photoreceptive characteristics and image-forming characteristics and, particularly, few in fatigue and deterioration even when they are repeatedly used, so that the durability can be excellent.

In addition to the above, the electrophotographic photoreceptors relating to the invention can widely be applied to an electrophotographic copier and, besides, to many applicable fields such as the photoreceptors for a printer in which a laser, cathode-ray tube or light emitting device (LED) is used as the light source thereof. Further, the invention can also be applied to the other devices than the photoreceptors and to an electroluminescence (EL).

EXAMPLES

The examples of the invention will now be more detailed. It is, however, to be understood that the embodiments of the invention shall not be limited thereto.

EXAMPLE 1

A polyamide was prepared by copolymerizing ε-amino-caproic acid, adipic acid and N-(β-aminoethyl)piperazine in a monomer composition proportion of 1:1:1. The resulting polyamide of 30 g was added into 200 ml of methanol EL standard (manufactured by Kanto Chemical Co.) of 800 ml, which was heated at 50° C. Then, the resulting mixture was dip-coated over an aluminium-made drum having a diameter of 80 mm, so that a 0.6 μm-thick interlayer was formed.

Next, 20 g of a fluorenone type bisazo pigment (that was Exemplified Compound F₁ -23) as a CGM and 10 g of polyvinyl butyral resin, Eslec BX-1 (manufactured by Sekisui Chemical Co.) as a binder were dissolved in 1000 ml of methyl ethyl ketone (manufactured by Kanto Chemical Co.). The resulting solution was milled by a sand-mill for 24 hours, so that a CGL coating solution was obtained. The CGL coating solution was dip-coated over the above-prepared interlayer, so that a 0.2 μm-thick CGL was formed.

After that, 140 g of Exemplified Compound No.1 and 165 g of polycarbonate resin, `Eupiron Z-200` (manufactured by Mitsubishi Gas-Chemical Co., Ltd.) were dissolved in 1000 ml of 1,2-dichloroethane, Special Class, (manufactured by Kanto Chemical Co.), so that a CTL coating solution was obtained.

The resulting CTL coating solution was dip-coated over the above-mentioned CGL and the resulting coated CGL was dried at 100° C. for 1 hour, so that a 23 μm-thick CTL was formed. In the manner mentioned above, the interlayer, the CGL and the CTL were laminated in this order, so that photoreceptive layer 1 was formed.

EXAMPLES 2 through 10

Photoreceptors 2 through 10 were each prepared in the same manner as in Example 1, except that the CGM and CTM used each in Example 1 were replaced by the exemplified compounds as shown in the following Table-1, respectively.

COMPARATIVE EXAMPLES 1 and 2

As shown in the following Table-1, the comparative photoreceptors were each prepared in the same manner as in Example 1, except that the CTM used in Example 1 was replaced by comparative compounds (1) and (2) which will be given later, respectively.

EXAMPLE 11

The interlayer was prepared in the same manner as in Example 1.

Polycyclic quinone type pigment (that was Exemplified Compound Q₁ -3) of 20 g as the CGM and polycarbonate resin C-1300 (manufactured by Teijin Chemical Ind. Co.) of 10 g were each dissolved in 1,2-dichloroethane Special Class (manufactured by Kanto Chemical Co.) and the resulting solution was milled by a ball-mill for 30 hours, so that a CGL coating solution was obtained. The resulting CGL coating solution was dip-coated over the aforementioned interlayer, so that a 0.6 μm-thick CGL was formed.

Next, photoreceptor 11 was prepared by laminating a CTL in the same manner as in Example 1.

EXAMPLES 12 through 20

Photoreceptors 12 through 20 were each prepared in the same manner as in Example 11, except that the CTM used in Example 11 was replaced by the exemplified compounds each as shown in the following Table-2, respectively.

COMPARATIVE EXAMPLES 3 and 4

As shown in the following Table-2, comparative photoreceptors 3 and 4 were each prepared in the same manner as in Example 11, except that the CTM used in Example 11 was replaced by comparative compounds (1) and (2), respectively.

EXAMPLE 21

After dissolving 12 g of polyvinyl butyral resin (Eslec BX-1 manufactured by Sekisui Chemical Co.) in 1000 ml of methyl ethyl ketone, the resulting solution was mixed with 5.7 g of Exemplified Compound Q₁ -3 and 0.5 g of Exemplified Compound F₁ -23 each as the CGMs and the resulting mixture was dispersed for 12 hours by making use of a sand-grinder.

The resulting dispersed solution was dip-coated over the interlayer mentioned in Example 1, so that a CGL was formed and, further, the CTL was formed by making use of Exemplified Compound No.2 as the CTM, so that photoreceptor 21 was prepared.

EXAMPLES 22 through 30

Photoreceptors 22 through 30 were each prepared in the same manner as in Example 21, except that the CGM and CTM each used in Example 21 were replaced by the exemplified compounds as shown in the following Table-3, respectively.

COMPARATIVE EXAMPLES 5 and 6

As shown in the following Table-3, comparative photoreceptors 5 and 6 were each prepared in the same manner as in Example 21, except that the CTM used in Example 21 was replaced by comparative compounds (1) and (2), respectively.

EXAMPLE 31

The polyamide of 50 g used in Example 1 was added and dissolved into 800 ml of methanol EL standard (manufactured by Kanto Chemical Co.) which was heated up to 50° C. The resulting solution was cooled down to room temperature and was then added with 200 ml of 1-butanol special class (Kanto Chemical Co.). After that, the resulting solution was dip-coated over an aluminium drum having a diameter of 80 mm, so that a 0.5 μm-thick interlayer was formed.

Next, 40 g of τ type non-metal phthalocyanine (τ-Pc) as a CGM was added into 2000 ml of methyl ethyl ketone EL standard (manufactured by Kanto Chemical Co.) in which 200 g of silicone resin `KR-5240` (having a solid component of 20%) (manufactured by Kanto Chemical Co.). The resulting solution was dispersed for 4 hours by making use of a sand-grinder, so that a CGL coating solution was obtained. The resulting coating solution was dip-coated over the foregoing interlayer, so that a 0.4 μm -thick CGL was formed.

Thereafter, 135 g of Exemplified Compound (3) and 165 g of polycarbonate `Eupiron Z-200` (manufactured by Mitsubishi Gas-Chemical Co.) were each dissolved in 1000 ml of 1,2-dichlorethane special class (manufactured by Kanto Chemical Co.), so that a CTL coating solution was obtained. The resulting coating solution was dip-coated over the above-mentioned CGL and the resulting coated VGL was dried at 100° C. for 1 hour, so that a 22 μm-thick CTL was obtained. After then, the interlayer, CGL and CTL were each laminated in this order, so that a photoreceptor was prepared.

EXAMPLES 32 through 40

Electrophotoreceptors 32 through 40 were each prepared in the same manner as in Example 31, except that the CGM used in Example 31 was replaced by the exemplified compounds as shown in the following Table-4, respectively.

COMPARATIVE EXAMPLES 7 and 8

The comparative electrophotoreceptors were each prepared in the same manner as in Example 31, except that the CTM used in Example 31 was replaced by Comparative Compound (1) and (2) as shown in the following Table-4, respectively.

EXAMPLE 41

A photoreceptor comprising an interlayer--a CGL--an CTL each laminated in this order was prepared in the same manner as in Example 1, except that an X type non-metal phthalocyanine (X-Pc) was used as the CGM.

EXAMPLES 42 through 50

Photoreceptors 42 through 50 were each prepared in the same manner as in Example 41, except that the CTM used in Example 41 was replaced by the exemplified compounds as shown in the following Table-5, respectively.

COMPARATIVE EXAMPLES 9 and 10

The comparative examples were each prepared in the same manner as in Example 41, except that the CTM used in Example 41 was replaced by Comparative Compounds (1) and (2) as shown in the following Table-5, respectively.

EXAMPLE 51

The photoreceptor comprising an interlayer--a CGL--a CTL laminated in this order was prepared in the same manner as in Example 1, except that the CGM used in Example 1 was replaced by the Y type oxytitanium phthalocyanine (Y-TiOPc) [for which, refer to The Bulletin of The Society of Electrophotography, 250(2), 29(2). 1990].

EXAMPLES 52 through 60

Photoreceptors 52 through 60 were each prepared in the same manner as in Example 51, except that the CTM used in Example 51 was replaced by the exemplified compounds as shown in the following Table-6, respectively.

COMPARATIVE EXAMPLES 11 and 12

The comparative photoreceptors were each prepared in the same manner as in Example 51, except that the CTM used in Example 51 was replaced by Comparative Compounds (1) and (2) as shown in the following Table-6, respectively.

EXAMPLE 61

The photoreceptor was prepared in the same manner as in the above-given example, except that the CGM used in the above-given example was replaced by a fluorenylidene type azo CGM.

EXAMPLES 62 through 70

Photoreceptors 62 through 70 were each prepared in the same manner as in Example 61, except that the CGM and CTM each used in Example 61 were each replaced by the exemplified compounds as shown in the following Table-7, respectively.

COMPARATIVE EXAMPLES 13 and 14

The comparative examples were each prepared in the same manner as in Example 61, except that the CTM used in Example 61 was replaced by Comparative Compounds (1) and (2) as shown in the following Table-7, respectively.

                  TABLE-1                                                          ______________________________________                                                  Photoreceptor                                                         Example No.                                                                             No.         CGM          CTM                                          ______________________________________                                         Inventive                                                                               Inventive   Compound F.sub.1 -23                                                                        Exemplified                                  Example 1                                                                               photoreceptor 1          compound 1                                   Inventive                                                                               Inventive   Compound F.sub.1 -23                                                                        Exemplified                                  Example 2                                                                               photoreceptor 2          compound 3                                   Inventive                                                                               Inventive   Compound F.sub.1 -23                                                                        Exemplified                                  Example 3                                                                               photoreceptor 3          compound 6                                   Inventive                                                                               Inventive   Compound F.sub.1 -23                                                                        Exemplified                                  Example 4                                                                               photoreceptor 4          compound 8                                   Inventive                                                                               Inventive   Compound F.sub.1 -1                                                                         Exemplified                                  Example 5                                                                               photoreceptor 5          compound 9                                   Inventive                                                                               Inventive   Compound F.sub.1 -1                                                                         Exemplified                                  Example 6                                                                               photoreceptor 6          compound 17                                  Inventive                                                                               Inventive   Compound F.sub.1 -1                                                                         Exemplified                                  Example 7                                                                               photoreceptor 7          compound 20                                  Inventive                                                                               Inventive   Compound F.sub.1 -1                                                                         Exemplified                                  Example 8                                                                               photoreceptor 8          compound 76                                  Inventive                                                                               Inventive   Compound F.sub.1 -7                                                                         Exemplified                                  Example 9                                                                               photoreceptor 9          compound 50                                  Inventive                                                                               Inventive   Compound F.sub.1 -16                                                                        Exemplified                                  Example 10                                                                              photoreceptor            compound 53                                           10                                                                    Comparative                                                                             Comparative Compound F.sub.1 -23                                                                        Comparative                                  Example 1                                                                               photoreceptor 1          compound (1)                                 Comparative                                                                             Comparative Compound F.sub.1 -23                                                                        Comparative                                  Example 2                                                                               photoreceptor 2          compound (2)                                 ______________________________________                                    

                  TABLE-2                                                          ______________________________________                                                  Photoreceptor                                                         Example No.                                                                             No.          CGM         CTM                                          ______________________________________                                         Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 11                                                                              photoreceptor 11         compound 1                                   Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 12                                                                              photoreceptor 12         compound 3                                   Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 13                                                                              photoreceptor 13         compound 6                                   Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 14                                                                              photoreceptor 14         compound 24                                  Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 15                                                                              photoreceptor 15         compound 26                                  Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 16                                                                              photoreceptor 16         compound 33                                  Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 17                                                                              photoreceptor 17         compound 77                                  Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 18                                                                              photoreceptor 18         compound 44                                  Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 19                                                                              photoreceptor 19         compound 51                                  Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 20                                                                              photoreceptor 20         compound 54                                  Comparative                                                                             Comparative  Compound Q.sub.1 -3                                                                        Comparative                                  Example 3                                                                               photoreceptor 3          compound (1)                                 Comparative                                                                             Comparative  Compound Q.sub.1 -3                                                                        Comparative                                  Example 4                                                                               photoreceptor 4          compound (2)                                 ______________________________________                                    

                  TABLE-3                                                          ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 21       F.sub.1 -23                                                                          compound 2                                 21                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 22       F.sub.1 -23                                                                          compound 6                                 22                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 23       F.sub.1 -23                                                                          compound 9                                 23                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 24       F.sub.1 -23                                                                          compound 11                                24                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 25       F.sub.1 -23                                                                          compound 15                                25                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 26       F.sub.1 -23                                                                          compound 21                                26                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 27       F.sub.1 -23                                                                          compound 82                                27                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 28       F.sub.1 -23                                                                          compound 31                                28                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 29       F.sub.1 -7                                                                           compound 42                                29                                                                             Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 30       F.sub.1 -16                                                                          compound 52                                30                                                                             Compar-                                                                               Comparative  Compound  Q.sub.1 -3,                                                                          Comparative                                ative  photoreceptor 5        F.sub.1 -23                                                                          compound (1)                               Example                                                                        Compar-                                                                               Comparative  Compound  Q.sub.1 -3,                                                                          Comparative                                ative  photoreceptor 6        F.sub.1 -23                                                                          compound (2)                               Example                                                                        6                                                                              ______________________________________                                    

                  TABLE-4                                                          ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 31                                                                            phthalocyanine                                                                               compound 3                                   31                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 32                                                                            phthalocyanine                                                                               compound 6                                   32                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 33                                                                            phthalocyanine                                                                               compound 7                                   33                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 34                                                                            phthalocyanine                                                                               compound 9                                   34                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 35                                                                            phthalocyanine                                                                               compound 15                                  35                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 36                                                                            phthalocyanine                                                                               compound 24                                  36                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 37                                                                            phthalocyanine                                                                               compound 31                                  37                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 38                                                                            phthalocyanine                                                                               compound 42                                  38                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 39                                                                            phthalocyanine                                                                               compound 81                                  39                                                                             Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 40                                                                            phthalocyanine                                                                               compound 67                                  40                                                                             Compar-                                                                               Comparative  τ type non-metallic                                                                      Comparative                                  ative  photoreceptor 7                                                                             phthalocyanine                                                                               compound (1)                                 Example                                                                        Compar-                                                                               Comparative  τ type non-metallic                                                                      Comparative                                  ative  photoreceptor 8                                                                             phthalocyanine                                                                               compound (2)                                 Example                                                                        8                                                                              ______________________________________                                    

                  TABLE-5                                                          ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No           CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 41                                                                            phthalocyanine                                                                               compound 1                                   41                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 42                                                                            phthalocyanine                                                                               compound 2                                   42                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 43                                                                            phthalocyanine                                                                               compound 6                                   43                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 44                                                                            phthalocyanine                                                                               compound 8                                   44                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 45                                                                            phthalocyanine                                                                               compound 9                                   45                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 46                                                                            phthalocyanine                                                                               compound 10                                  46                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 47                                                                            phthalocyanine                                                                               compound 21                                  47                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 48                                                                            phthalocyanine                                                                               compound 31                                  48                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 49                                                                            phthalocyanine                                                                               compound 45                                  49                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 50                                                                            phthalocyanine                                                                               compound 51                                  50                                                                             Compar-                                                                               Comparative  X type non-metallic                                                                          Comparative                                  ative  photoreceptor 9                                                                             phthalocyanine                                                                               compound (1)                                 Example                                                                        Compar-                                                                               Comparative  X type non-metallic                                                                          Comparative                                  ative  photoreceptor 10                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        10                                                                             ______________________________________                                    

                  TABLE-6                                                          ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No           CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 51                                                                            phthalocyanine                                                                               compound 1                                   51                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 52                                                                            phthalocyanine                                                                               compound 6                                   52                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 53                                                                            phthalocyanine                                                                               compound 9                                   53                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 54                                                                            phthalocyanine                                                                               compound 18                                  54                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 55                                                                            phthalocyanine                                                                               compound 21                                  55                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 56                                                                            phthalocyanine                                                                               compound 34                                  56                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 57                                                                            phthalocyanine                                                                               compound 42                                  57                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 58                                                                            phthalocyanine                                                                               compound 78                                  58                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 59                                                                            phthalocyanine                                                                               compound 67                                  59                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 60                                                                            phthalocyanine                                                                               compound 70                                  60                                                                             Compar-                                                                               Comparative  Y type oxytitanium                                                                           Comparative                                  ative  photoreceptor 11                                                                            phthalocyanine                                                                               compound (1)                                 Example                                                                        11                                                                             Compar-                                                                               Comparative  Y type oxytitanium                                                                           Comparative                                  ative  photoreceptor 12                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        12                                                                             ______________________________________                                    

                  TABLE-7                                                          ______________________________________                                                  Photoreceptor                                                         Example No.                                                                             No           CGM         CTM                                          ______________________________________                                         Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 61                                                                              photoreceptor 61         compound 3                                   Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 62                                                                              photoreceptor 62         compound 6                                   Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 63                                                                              photoreceptor 63         compound 15                                  Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 64                                                                              photoreceptor 64         compound 23                                  Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 65                                                                              photoreceptor 65         compound 31                                  Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 66                                                                              photoreceptor 66         compound 33                                  Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 67                                                                              photoreceptor 67         compound 37                                  Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 68                                                                              photoreceptor 68         compound 42                                  Inventive                                                                               Inventive    Compound F.sub.2 -3                                                                        Exemplified                                  Example 69                                                                              photoreceptor 69         compound 50                                  Inventive                                                                               Inventive    Compound F.sub.2 -5                                                                        Exemplified                                  Example 70                                                                              photoreceptor 70         compound 59                                  Comparative                                                                             Comparative  Compound F.sub.2 -6                                                                        Comparative                                  Example 13                                                                              photoreceptor 13         compound (1)                                 Comparative                                                                             Comparative  Compound F.sub.2 -6                                                                        Comparative                                  Example 14                                                                              photoreceptor 14         compound (2)                                 ______________________________________                                    

EVALUATION EXAMPLE 1

The residual potentials Vr were each measured when a series of electric-charging·Exposing operations were repeated 20,000 times by making use of a copier, modified U-Bix Model 5076 manufactured by Konica Corp. (in which the charging electrode was changed to be negative and the exposure amount was changed into 4.65 lux) and by changing the linear velocities into 3 velocities, namely 240, 330 and 440 mm/sec. The results of the measurements are shown in the following Tables-8 through 10. The residual potentials of the photoreceptors applied with the CTM of the invention did not become intense when the linear velocities were made faster than those of the photoreceptors applied with the comparative compounds, so that an excellent high velocities were shown. In the meanwhile, the initial white-paper potentials (Vw) were each shown in Tables-8 through 10.

EVALUATION EXAMPLE 2

The 100,000 times continuous copying tests were tries by making use of A-4 size regenerated paper and the copier, modified U-Bix Model 5076 manufactured by Konica Corp., which was the same as in Evaluation Example 1. The results thereof are shown in the following Tables-11 through 13. The photoreceptors applied with the compounds of the invention provided excellent images upto the 100,000th copy and, on the other hand, the comparative photoreceptors produced several white-dots in the solid-black image areas after the 20,000 to 30,000th copying tests. The white-dots were evaluated by visually counting the numbers of the white-dots produced on a solid-black image in A-4 size. The results thereof are shown in Tables-11 through 13.

EVALUATION EXAMPLE 3

The resulting electric potential in an unexposed area VH and electric potential in an exposed area VL were each measured at an ordinary temperature (of 25° C.) and a low temperature (of 10° C.) by making use of a digital copier, U-Bix Model 8028 manufactured by Konica Corp. The results thereof are shown in the following Tables-14 through 17.

EVALUATION EXAMPLE 4

The resulting black-dots produced in the white-background of a copied image were evaluated after making use of the digital copier, U-Bix Model 8028 manufactured by Konica Corp., which was the same as that used in the above-described Evaluation Example 3, loading the subject photoreceptor into a developer and then image-copying several times. The results thereof are shown in the following Tables-18 through 21.

The resulting black-dots were evaluated by measuring the dot-sizes and numbers of the black-dots through an image analyzer, `Omnicon Model 300` (manufactured by Shimazu Mfg. Works). The results were judged by counting the numbers of the resulting black-dots having a size .0. of not smaller than 0.05 mm in one cm². The judgement criteria of evaluating the black-dots are shown in the following table.

                  TABLE                                                            ______________________________________                                         Black spots of not smaller                                                                        black dot                                                   than .0.0.05 mm in size                                                                           judgement                                                   ______________________________________                                         Nil/cm.sup.2       ⊚                                            1˜3 spots/cm.sup.2                                                                          ◯                                               4˜10 spots/cm.sup.2                                                                         Δ                                                     Not less than 11 spots/cm.sup.2                                                                   X                                                           ______________________________________                                    

In the table, when a black-dot judgement was resulted to be ⊚ and ◯, the subject photoreceptor can be put to practical use; when it is resulted to be Δ, the subject photoreceptor may sometimes be impractical; and when it was proved to be ×, the subject photoreceptor cannot be practical.

                  TABLE-8                                                          ______________________________________                                                 Initial                                                                               Vr (v) after 20000th repetition                                         white  at the following linear velocity                                          paper    Repetition                                                                               Repetition                                                                             Repetition                                Photoreceptor                                                                            potential,                                                                              at 240    at 330  at 440                                    No.       Vw (v)   mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive 51       10        14      21                                        photoreceptor 1                                                                Inventive 52       9         12      19                                        photoreceptor 2                                                                Inventive 50       12        16      22                                        photoreceptor 3                                                                Inventive 49       13        16      20                                        photoreceptor 4                                                                Inventive 52       11        15      21                                        photoreceptor 5                                                                Inventive 53       14        15      23                                        photoreceptor 6                                                                Inventive 51       15        17      22                                        photoreceptor 7                                                                Inventive 55       12        16      25                                        photoreceptor 8                                                                Inventive 50       13        16      26                                        photoreceptor 9                                                                Inventive 52       14        18      27                                        photoreceptor                                                                  10                                                                             Comparative                                                                              61       15        38      75                                        photoreceptor 1                                                                Comparative                                                                              73       17        45      89                                        photoreceptor 2                                                                ______________________________________                                    

                  TABLE-9                                                          ______________________________________                                                 Initial                                                                               Vr (v) after 20000th repetition                                         white  at the following linear velocity                                          paper    Repetition                                                                               Repetition                                                                             Repetition                                Photoreceptor                                                                            potential,                                                                              at 240    at 330  at 440                                    No.       Vw (v)   mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive  96      10        12      20                                        photoreceptor                                                                  11                                                                             Inventive 101      8         11      19                                        photoreceptor                                                                  12                                                                             Inventive  97      11        13      19                                        photoreceptor                                                                  13                                                                             Inventive  92      15        17      23                                        photoreceptor                                                                  14                                                                             Inventive  96      12        16      25                                        photoreceptor                                                                  15                                                                             Inventive  98      16        19      24                                        photoreceptor                                                                  16                                                                             Inventive 100      13        16      21                                        photoreceptor                                                                  17                                                                             Inventive 102      14        16      26                                        photoreceptor                                                                  18                                                                             Inventive 104      10        13      22                                        photoreceptor                                                                  19                                                                             Inventive 105      15        18      25                                        photoreceptor                                                                  20                                                                             Comparative                                                                              112      14        37      75                                        photoreceptor 3                                                                Comparative                                                                              121      15        39      79                                        photoreceptor 4                                                                ______________________________________                                    

                  TABLE-10                                                         ______________________________________                                                 Initial                                                                               Vr (v) after 20000th repetition                                         white  at the following linear velocity                                          paper    Repetition                                                                               Repetition                                                                             Repetition                                Photoreceptor                                                                            potential,                                                                              at 240    at 330  at 440                                    No.       Vw (v)   mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive 75       10        15      20                                        photoreceptor                                                                  21                                                                             Inventive 66       11        15      23                                        photoreceptor                                                                  22                                                                             Inventive 76       14        18      24                                        photoreceptor                                                                  23                                                                             Inventive 65       12        18      26                                        photoreceptor                                                                  24                                                                             Inventive 61       13        19      24                                        photoreceptor                                                                  25                                                                             Inventive 63       15        20      23                                        photoreceptor                                                                  26                                                                             Inventive 77       16        21      26                                        photoreceptor                                                                  27                                                                             Inventive 73       15        20      27                                        photoreceptor                                                                  28                                                                             Inventive 71       17        23      28                                        photoreceptor                                                                  29                                                                             Inventive 75       18        22      30                                        photoreceptor                                                                  30                                                                             Comparative                                                                              80       17        45      85                                        photoreceptor 5                                                                Comparative                                                                              95       18        37      84                                        photoreceptor 6                                                                ______________________________________                                    

                  TABLE-11                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white spots                                                                               white spots                                                                               white spots                                              produced   produced   produced after                                Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             100000th                                      No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          0                                             photoreceptor 1                                                                Inventive  0          0          0                                             photoreceptor 2                                                                Inventive  0          0          0                                             photoreceptor 3                                                                Inventive  0          0          0                                             photoreceptor 4                                                                Inventive  0          0          2                                             photoreceptor 5                                                                Inventive  0          1          0                                             photoreceptor 6                                                                Inventive  0          0          0                                             photoreceptor 7                                                                Inventive  0          0          1                                             photoreceptor 8                                                                Inventive  0          0          0                                             photoreceptor 9                                                                Inventive  0          0          1                                             photoreceptor 10                                                               Comparative                                                                               6          23         31                                            photoreceptor 1                                                                Comparative                                                                               4          19         37                                            photoreceptor 2                                                                ______________________________________                                    

                  TABLE-12                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white spots                                                                               white spots                                                                               white spots                                              produced   produced   produced after                                Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             100000th                                      No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          0                                             photoreceptor 11                                                               Inventive  0          0          0                                             photoreceptor 12                                                               Inventive  0          0          1                                             photoreceptor 13                                                               Inventive  0          0          2                                             photoreceptor 14                                                               Inventive  0          1          0                                             photoreceptor 15                                                               Inventive  0          0          0                                             photoreceptor 16                                                               Inventive  0          0          1                                             photoreceptor 17                                                               Inventive  0          1          3                                             photoreceptor 18                                                               Inventive  0          0          1                                             photoreceptor 19                                                               Inventive  0          0          5                                             photoreceptor 20                                                               Comparative                                                                               5          27         43                                            photoreceptor 3                                                                Comparative                                                                               4          25         47                                            photoreceptor 4                                                                ______________________________________                                    

                  TABLE-13                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white spots                                                                               white spots                                                                               white spots                                              produced   produced   produced after                                Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             100000th                                      No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          0                                             photoreceptor 21                                                               Inventive  0          0          0                                             photoreceptor 22                                                               Inventive  0          0          0                                             photoreceptor 23                                                               Inventive  0          0          0                                             photoreceptor 24                                                               Inventive  0          0          1                                             photoreceptor 25                                                               Inventive  0          0          0                                             photoreceptor 26                                                               Inventive  0          0          2                                             photoreceptor 27                                                               Inventive  0          0          0                                             photoreceptor 28                                                               Inventive  0          0          1                                             photoreceptor 29                                                               Inventive  0          1          1                                             photoreceptor 30                                                               Comparative                                                                               3          12         32                                            photoreceptor 5                                                                Comparative                                                                               4          18         38                                            photoreceptor 6                                                                ______________________________________                                    

                  TABLE-14                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    707     103       709    104                                      photoreceptor 31                                                               Inventive    702     105       705    106                                      photoreceptor 32                                                               Inventive    705     101       707    100                                      photoreceptor 33                                                               Inventive    710     96        712    100                                      photoreceptor 34                                                               Inventive    708     102       710    105                                      photoreceptor 35                                                               Inventive    701     104       703    108                                      photoreceptor 36                                                               Inventive    700     106       702    109                                      photoreceptor 37                                                               Inventive    698     110       700    107                                      photoreceptor 38                                                               Inventive    702     108       705    109                                      photoreceptor 39                                                               Inventive    703     106       705    110                                      photoreceptor 40                                                               Comparative  697     107       700    152                                      photoreceptor 7                                                                Comparative  697     123       685    179                                      photoreceptor 8                                                                ______________________________________                                    

                  TABLE-15                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    704     101       705    103                                      photoreceptor 41                                                               Inventive    706     106       707    108                                      photoreceptor 42                                                               Inventive    708     104       709    109                                      photoreceptor 43                                                               Inventive    702     100       704    100                                      photoreceptor 44                                                               Inventive    705     102       707    105                                      photoreceptor 45                                                               Inventive    710     105       712    108                                      photoreceptor 46                                                               Inventive    711     112       713    114                                      photoreceptor 47                                                               Inventive    703     109       705    115                                      photoreceptor 48                                                               Inventive    704     110       707    113                                      photoreceptor 49                                                               Inventive    706     111       708    114                                      photoreceptor 50                                                               Comparative  708     120       678    159                                      photoreceptor 9                                                                Comparative  717     122       682    175                                      photoreceptor 10                                                               ______________________________________                                    

                  TABLE-16                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    705     50        707    51                                       photoreceptor 51                                                               Inventive    706     52        706    54                                       photoreceptor 52                                                               Inventive    704     48        708    50                                       photoreceptor 53                                                               Inventive    703     53        705    53                                       photoreceptor 54                                                               Inventive    701     51        702    53                                       photoreceptor 55                                                               Inventive    704     51        703    51                                       photoreceptor 56                                                               Inventive    705     49        702    50                                       photoreceptor 57                                                               Inventive    698     50        704    51                                       photoreceptor 58                                                               Inventive    702     54        705    55                                       photoreceptor 59                                                               Inventive    701     52        703    55                                       photoreceptor 60                                                               Comparative  711     62        685    90                                       photoreceptor 11                                                               Comparative  715     59        685    81                                       photoreceptor 12                                                               ______________________________________                                    

                  TABLE-17                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    701     102       701    105                                      photoreceptor 61                                                               Inventive    702     105       704    106                                      photoreceptor 62                                                               Inventive    705     106       706    107                                      photoreceptor 63                                                               Inventive    703     104       705    105                                      photoreceptor 64                                                               Inventive    704     105       706    106                                      photoreceptor 65                                                               Inventive    707     108       708    109                                      photoreceptor 66                                                               Inventive    705     109       706    110                                      photoreceptor 67                                                               Inventive    702     107       704    108                                      photoreceptor 68                                                               Inventive    710     101       710    102                                      photoreceptor 69                                                               Inventive    708     105       710    106                                      photoreceptor 70                                                               Comparative  716     112       687    155                                      photoreceptor 13                                                               Comparative  708     126       683    148                                      photoreceptor 14                                                               ______________________________________                                    

                  TABLE-18                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 31                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 32                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 33                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 34                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 35                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 36                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 37                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 38                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 39                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 40                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 7                                                                Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 8                                                                ______________________________________                                    

                  TABLE-19                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 41                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 42                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 43                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 44                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 45                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 46                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 47                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 48                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 49                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 50                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 9                                                                Comparative                                                                               ◯                                                                            Δ    Δ                                        photoreceptor 10                                                               ______________________________________                                    

                  TABLE-20                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 51                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 52                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 53                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 54                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 55                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 56                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 57                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 58                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 59                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 60                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 11                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 12                                                               ______________________________________                                    

                  TABLE-21                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 61                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 62                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 63                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 64                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 65                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 66                                                               Inventive  ◯                                                                            ◯                                                                             ◯                                  photoreceptor 67                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 68                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 69                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 70                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 13                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 14                                                               ______________________________________                                    

EXAMPLES 71 THROUGH 105 AND COMPARATIVE EXAMPLES 15 THROUGH 28

Photoreceptors 71 through 105 and comparative photoreceptors 15 through 28 were each prepared in the same manner as in Example 1, except that the CTM used in Example 1 was replaced by the compounds each shown in the following Tables-22 through 28, respectively. The characteristic evaluations thereof were then carried out in the same manners described above, and the results thereof are shown in the following Tables-29 through 42, respectively. It was proved from the results thereof that, as same as in the aforementioned Example 1, the photoreceptivities, residual potentials, image qualities and electric potential stabilities could each be excellent when making use of the CTM of the invention.

                  TABLE-22                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM          CTM                                           ______________________________________                                         Inventive                                                                             Inventive    Compound F.sub.1 -23                                                                        Exemplified                                   Example                                                                               photoreceptor 71          compound (11)                                 71                                                                             Inventive                                                                             Inventive    Compound F.sub.1 -23                                                                        Exemplified                                   Example                                                                               photoreceptor 72          compound (20)                                 72                                                                             Inventive                                                                             Inventive    Compound F.sub.1 -1                                                                         Exemplified                                   Example                                                                               photoreceptor 73          compound (14)                                 73                                                                             Inventive                                                                             Inventive    Compound F.sub.1 -1                                                                         Exemplified                                   Example                                                                               photoreceptor 74          compound (4)                                  74                                                                             Inventive                                                                             Inventive    Compound F.sub.1 -6                                                                         Exemplified                                   Example                                                                               photoreceptor 75          compound (11)                                 75                                                                             Compar-                                                                               Comparative  Compound F.sub.1 -23                                                                        Comparative                                   ative  photoreceptor 15          compound (1)                                  Example                                                                        15                                                                             Compar-                                                                               Comparative  Compound F.sub.1 -23                                                                        Comparative                                   ative  photoreceptor 16          compound (2)                                  Example                                                                        16                                                                             ______________________________________                                    

                  TABLE-23                                                         ______________________________________                                                  Photoreceptor                                                         Example No.                                                                             No.          CGM         CTM                                          ______________________________________                                         Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 76                                                                              photoreceptor 76         compound (1)                                 Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 77                                                                              photoreceptor 77         compound (4)                                 Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 78                                                                              photoreceptor 78         compound                                                                       (11)                                         Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 79                                                                              photoreceptor 79         compound                                                                       (13)                                         Inventive                                                                               Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                  Example 80                                                                              photoreceptor 80         compound                                                                       (25)                                         Comparative                                                                             Comparative  Compound Q.sub.1 -3                                                                        Comparative                                  Example 17                                                                              photoreceptor 17         compound (1)                                 Comparative                                                                             Comparative  Compound Q.sub.1 -3                                                                        Comparative                                  Example 18                                                                              photoreceptor 18         compound (2)                                 ______________________________________                                    

                  TABLE-24                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 81       F.sub.1 -23                                                                          compound                                   81                                  (28)                                       Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 82       F.sub.1 -23                                                                          compound                                   82                                  (11)                                       Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 83       F.sub.1 -23                                                                          compound                                   83                                  (20)                                       Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 84       F.sub.1 -23                                                                          compound                                   84                                  (50)                                       Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 85       F.sub.1 -23                                                                          compound                                   85                                  (37)                                       Inventive                                                                             Inventive    Compound  Q.sub.1 -3,                                                                          Exemplified                                Compar-                                                                               Comparative  Compound  Q.sub.1 -3,                                                                          Comparative                                ative  photoreceptor 19       F.sub.1 -23                                                                          compound (1)                               Example                                                                        19                                                                             Compar-                                                                               Comparative  Compound  Q.sub.1 -3,                                                                          Comparative                                ative  photoreceptor 20       F.sub.1 -23                                                                          compound (2)                               Example                                                                        20                                                                             ______________________________________                                    

                  TABLE-25                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 86                                                                            phthalocyanine                                                                               compound                                     86                                (14)                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 87                                                                            phthalocyanine                                                                               compound                                     87                                (11)                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 88                                                                            phthalocyanine                                                                               compound                                     88                                (17)                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 89                                                                            phthalocyanine                                                                               compound                                     89                                (22)                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 90                                                                            phthalocyanine                                                                               compound                                     90                                (20)                                         Compar-                                                                               Comparative  τ type non-metallic                                                                      Comparative                                  ative  photoreceptor 21                                                                            phthalocyanine                                                                               compound (1)                                 Example                                                                        21                                                                             Compar-                                                                               Comparative  τ type non-metallic                                                                      Comparative                                  ative  photoreceptor 22                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        22                                                                             ______________________________________                                    

                  TABLE-26                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 91                                                                            phthalocyanine                                                                               compound                                     91                                (42)                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 92                                                                            phthalocyanine                                                                               compound (8)                                 92                                                                             Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 93                                                                            phthalocyanine                                                                               compound                                     93                                (11)                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 94                                                                            phthalocyanine                                                                               compound                                     94                                (31)                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 95                                                                            phthalocyanine                                                                               compound                                     95                                (20)                                         Compar-                                                                               Comparative  X type non-metallic                                                                          Comparative                                  ative  photoreceptor 23                                                                            phthalocyanine                                                                               compound (1)                                 Example                                                                        23                                                                             Compar-                                                                               Comparative  X type non-metallic                                                                          Comparative                                  ative  photoreceptor 24                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        24                                                                             ______________________________________                                    

                  TABLE-27                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 96                                                                            phthalocyanine                                                                               compound (2)                                 96                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 97                                                                            phthalocyanine                                                                               compound                                     97                                (40)                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 98                                                                            phthalocyanine                                                                               compound (5)                                 98                                                                             Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 99                                                                            phthalocyanine                                                                               compound                                     99                                (11)                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 100                                                                           phthalocyanine                                                                               compound                                     100                               (14)                                         Compar-                                                                               Comparative  Y type oxytitanium                                                                           Comparative                                  ative  photoreceptor 25                                                                            phthalocyanine                                                                               compound (1)                                 Example                                                                        25                                                                             Compar-                                                                               Comparative  Y type oxytitanium                                                                           Comparative                                  ative  photoreceptor 26                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        26                                                                             ______________________________________                                    

                  TABLE-28                                                         ______________________________________                                                  Photoreceptor                                                         Example No.                                                                             No.          CGM         CTM                                          ______________________________________                                         Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 101                                                                             photoreceptor 101        compound (6)                                 Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 102                                                                             photoreceptor 102        compound                                                                       (26)                                         Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 103                                                                             photoreceptor 103        compound                                                                       (11)                                         Inventive                                                                               Inventive    Compound F.sub.2 -6                                                                        Exemplified                                  Example 104                                                                             photoreceptor 104        compound                                                                       (14)                                         Inventive                                                                               Inventive    Compound F.sub.2 -5                                                                        Exemplified                                  Example 105                                                                             photoreceptor 105        compound                                                                       (60)                                         Comparative                                                                             Comparative  Compound F.sub.2 -6                                                                        Comparative                                  Example 27                                                                              photoreceptor 27         compound (1)                                 Comparative                                                                             Comparative  Compound F.sub.2 -6                                                                        Comparative                                  Example 28                                                                              photoreceptor 28         compound (2)                                 ______________________________________                                    

                  TABLE-29                                                         ______________________________________                                                        Vr (v) after 20000th repetition                                        Initial at the following linear velocity                                         white paper                                                                              Repetition                                                                               Repetition                                                                             Repetition                                Photorecep-                                                                             potential,                                                                               at 240    at 330  at 440                                    tor No.  Vw (v)    mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive                                                                               51        12        16      20                                        photoreceptor                                                                  71                                                                             Inventive                                                                               48        10        14      18                                        photoreceptor                                                                  72                                                                             Inventive                                                                               50        13        15      19                                        photoreceptor                                                                  73                                                                             Inventive                                                                               74        10        12      17                                        photoreceptor                                                                  74                                                                             Inventive                                                                               52        13        16      21                                        photoreceptor                                                                  75                                                                             Comparative                                                                             61        15        38      75                                        photoreceptor                                                                  15                                                                             Comparative                                                                             73        17        45      89                                        photoreceptor                                                                  16                                                                             ______________________________________                                    

                  TABLE-30                                                         ______________________________________                                                        Vr (v) after 20000th repetition                                        Initial at the following linear velocity                                         white paper                                                                              Repetition                                                                               Repetition                                                                             Repetition                                Photorecep-                                                                             potential,                                                                               at 240    at 330  at 440                                    tor No.  Vw (v)    mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive                                                                                97       11        13      22                                        photoreceptor                                                                  76                                                                             Inventive                                                                                99       10        14      23                                        photoreceptor                                                                  77                                                                             Inventive                                                                                94       9         11      21                                        photoreceptor                                                                  78                                                                             Inventive                                                                               100       12        15      25                                        photoreceptor                                                                  79                                                                             Inventive                                                                               102       10        13      24                                        photoreceptor                                                                  80                                                                             Comparative                                                                             112       14        37      75                                        photoreceptor                                                                  17                                                                             Comparative                                                                             121       15        39      79                                        photoreceptor                                                                  18                                                                             ______________________________________                                    

                  TABLE-31                                                         ______________________________________                                                        Vr (v) after 20000th repetition                                        Initial at the following linear velocity                                         white paper                                                                              Repetition                                                                               Repetition                                                                             Repetition                                Photorecep-                                                                             potential,                                                                               at 240    at 330  at 440                                    tor No.  Vw (v)    mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive                                                                               63        10        14      22                                        photoreceptor                                                                  81                                                                             Inventive                                                                               70        13        15      25                                        photoreceptor                                                                  82                                                                             Inventive                                                                               65        9         13      19                                        photoreceptor                                                                  83                                                                             Inventive                                                                               69        15        18      26                                        photoreceptor                                                                  84                                                                             Inventive                                                                               71        14        19      27                                        photoreceptor                                                                  85                                                                             Comparative                                                                             80        17        45      85                                        photoreceptor                                                                  19                                                                             Comparative                                                                             95        18        37      84                                        photoreceptor                                                                  20                                                                             ______________________________________                                    

                  TABLE-32                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white spots                                                                               white spots                                                                               white spots                                              produced   produced   produced after                                Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             100000th                                      No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          1                                             photoreceptor 71                                                               Inventive  0          0          0                                             photoreceptor 72                                                               Inventive  0          0          0                                             photoreceptor 73                                                               Inventive  0          1          1                                             photoreceptor 74                                                               Inventive  0          0          1                                             photoreceptor 75                                                               Comparative                                                                               6          23         31                                            photoreceptor 15                                                               Comparative                                                                               4          19         37                                            photoreceptor 16                                                               ______________________________________                                    

                  TABLE-33                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white spots                                                                               white spots                                                                               white spots                                              produced   produced   produced after                                Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             100000th                                      No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          1          1                                             photoreceptor 76                                                               Inventive  0          1          1                                             photoreceptor 77                                                               Inventive  0          0          0                                             photoreceptor 78                                                               Inventive  0          0          1                                             photoreceptor 79                                                               Inventive  0          0          2                                             photoreceptor 80                                                               Comparative                                                                               5          27         43                                            photoreceptor 17                                                               Comparative                                                                               4          25         47                                            photoreceptor 18                                                               ______________________________________                                    

                  TABLE-34                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white spots                                                                               white spots                                                                               white spots                                              produced   produced   produced after                                Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             100000th                                      No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          0                                             photoreceptor 81                                                               Inventive  0          0          1                                             photoreceptor 82                                                               Inventive  0          0          0                                             photoreceptor 83                                                               Inventive  0          0          0                                             photoreceptor 84                                                               Inventive  0          1          0                                             photoreceptor 85                                                               Comparative                                                                               3          12         32                                            photoreceptor 19                                                               Comparative                                                                               2          18         38                                            photoreceptor 20                                                               ______________________________________                                    

                  TABLE-35                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    712      97       716    101                                      photoreceptor 86                                                               Inventive    705      96       711    108                                      photoreceptor 87                                                               Inventive    698     103       702    105                                      photoreceptor 88                                                               Inventive    703     101       700    103                                      photoreceptor 89                                                               Inventive    708     104       712    107                                      photoreceptor 90                                                               Comparative  697     107       700    152                                      photoreceptor 21                                                               Comparative  697     123       685    179                                      photoreceptor 22                                                               ______________________________________                                    

                  TABLE-36                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    698     100       700     99                                      photoreceptor 91                                                               Inventive    703     102       704    101                                      photoreceptor 92                                                               Inventive    702     104       701    105                                      photoreceptor 93                                                               Inventive    708     106       711    107                                      photoreceptor 94                                                               Inventive    699      98       702    103                                      photoreceptor 95                                                               Comparative  708     120       678    159                                      photoreceptor 23                                                               Comparative  717     122       682    175                                      photoreceptor 24                                                               ______________________________________                                    

                  TABLE-37                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    702     51        706    53                                       photoreceptor 96                                                               Inventive    708     52        709    55                                       photoreceptor 97                                                               Inventive    705     51        707    53                                       photoreceptor 98                                                               Inventive    711     55        713    56                                       photoreceptor 99                                                               Inventive    698     49        701    50                                       photoreceptor 100                                                              Comparative  711     62        685    90                                       photoreceptor 25                                                               Comparative  715     59        685    81                                       photoreceptor 26                                                               ______________________________________                                    

                  TABLE-38                                                         ______________________________________                                                     Ordinary temperature                                                                          Low temperature                                     Photoreceptor                                                                              (25° C.)                                                                               (10° C.)                                     No.          VH (v)  VL (v)    VH (v) VL (v)                                   ______________________________________                                         Inventive    702      99       701    103                                      photoreceptor 101                                                              Inventive    708     109       710    103                                      photoreceptor 102                                                              Inventive    704     108       702    102                                      photoreceptor 103                                                              Inventive    706     106       705    104                                      photoreceptor 104                                                              Inventive    712     100       713    101                                      photoreceptor 105                                                              Comparative  716     112       687    155                                      photoreceptor 27                                                               Comparative  708     126       683    148                                      photoreceptor 28                                                               ______________________________________                                    

                  TABLE-39                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 86                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 87                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 88                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 89                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 90                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 21                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 22                                                               ______________________________________                                    

                  TABLE-40                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 91                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 92                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 93                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 94                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 95                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 23                                                               Comparative                                                                               ◯                                                                            Δ    Δ                                        photoreceptor 24                                                               ______________________________________                                    

                  TABLE-41                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 96                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 97                                                               Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 98                                                               Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 99                                                               Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 100                                                              Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 25                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 26                                                               ______________________________________                                    

                  TABLE-42                                                         ______________________________________                                                    Black spot                                                                               Black spot                                                           judgement judgement  Black spot                                                made after                                                                               made       judgement made                                 Photoreceptor                                                                             20000th   after 50000th                                                                             after 100000th                                 used       copies    copies     copies                                         ______________________________________                                         Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 101                                                              Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 102                                                              Inventive  ⊚                                                                         ⊚                                                                          ⊚                               photoreceptor 103                                                              Inventive  ⊚                                                                         ◯                                                                             ◯                                  photoreceptor 104                                                              Inventive  ⊚                                                                         ⊚                                                                          ◯                                  photoreceptor 105                                                              Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 27                                                               Comparative                                                                               ◯                                                                            Δ    X                                              photoreceptor 28                                                               ______________________________________                                    

EXAMPLES 106-175 and COMPARATIVE EXAMPLES 29-42

Photoreceptors 106 through 175 and comparative photoreceptors 29 through 42 were each prepared in the same manner as in Example 1, except that the CGM and CTM used in Example 1 were each replaced by the compounds each shown in the following Tables-43 through 49, respectively. The characteristic evaluations thereof were then carried out in the same manners described above, and the results thereof are shown in the following Tables-50 through 63, respectively. It was proved from the results thereof that, as same as in the aforementioned Example 1, the photoreceptivities, residual potentials, image qualities and electric potential stabilities could each be excellent when making use of the CTM of the invention.

                  TABLE-43                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM          CTM                                           ______________________________________                                         Inventive                                                                             Inventive    Compounds F.sub.1 -23                                                                       Exemplified                                   Example                                                                               photoreceptor 106         compounds [3]                                 106                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -23                                                                       Exemplified                                   Example                                                                               photoreceptor 107         compounds [12]                                107                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -23                                                                       Exemplified                                   Example                                                                               photoreceptor 108         compounds [21]                                108                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -23                                                                       Exemplified                                   Example                                                                               photoreceptor 109         compounds [29]                                109                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -23                                                                       Exemplified                                   Example                                                                               photoreceptor 110         compounds [37]                                110                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -1                                                                        Exemplified                                   Example                                                                               photoreceptor 111         compounds [53]                                111                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -1                                                                        Exemplified                                   Example                                                                               photoreceptor 112         compounds [56]                                112                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -1                                                                        Exemplified                                   Example                                                                               photoreceptor 113         compounds [66]                                113                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -7                                                                        Exemplified                                   Example                                                                               photoreceptor 114         compounds [78]                                114                                                                            Inventive                                                                             Inventive    Compounds F.sub.1 -6                                                                        Exemplified                                   Example                                                                               photoreceptor 115         compounds                                     115                              [150]                                         Compar-                                                                               Comparative  Compound F.sub.1 -23                                                                        Comparative                                   ative  photoreceptor 29          compound (3)                                  Example                                                                        29                                                                             Compar-                                                                               Comparative  Compound F.sub. 1 -23                                                                       Comparative                                   ative  photoreceptor 30          compound (2)                                  Example                                                                        30                                                                             ______________________________________                                          *Comparative Example (3) is shown later.                                 

                  TABLE-44                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM         CTM                                            ______________________________________                                         Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 116        compounds [1]                                  116                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 117        compounds [21]                                 117                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 118        compounds [33]                                 118                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 119        compounds [45]                                 119                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 120        compounds [48]                                 120                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 121        compounds [57]                                 121                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 122        compounds [65]                                 122                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 123        compounds [87]                                 123                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 124        compounds [93]                                 124                                                                            Inventive                                                                             Inventive    Compound Q.sub.1 -3                                                                        Exemplified                                    Example                                                                               photoreceptor 125        compounds [150]                                125                                                                            Compar-                                                                               Comparative  Compound Q.sub.1 -3                                                                        Comparative                                    ative  photoreceptor 31         compound (3)                                   Example                                                                        31                                                                             Compar-                                                                               Comparative  Compound Q.sub.1 -3                                                                        Comparative                                    ative  photoreceptor 32         compound (2)                                   Example                                                                        32                                                                             ______________________________________                                    

                  TABLE-45                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 126      F.sub.1 -23                                                                          compound                                   126                                 [21]                                       Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 127      F.sub.1 -23                                                                          compound                                   127                                 [39]                                       Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 128      F.sub.1 -23                                                                          compound                                   128                                 [48]                                       Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 129      F.sub.1 -23                                                                          compound                                   129                                 [66]                                       Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 130      F.sub.1 -23                                                                          compound                                   130                                 [73]                                       Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 131      F.sub.1 -23                                                                          compound                                   131                                 [92]                                       Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 132      F.sub.1 -23                                                                          compound                                   132                                 [100]                                      Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 133      F.sub.1 -23                                                                          compound                                   133                                 [114]                                      Inventive                                                                             Inventive    Compounds Q.sub. 1 -3,                                                                         Exemplified                                Example                                                                               photoreceptor 134      F.sub.1 -23                                                                          compound                                   134                                 [120]                                      Inventive                                                                             Inventive    Compounds Q.sub.1 -3,                                                                          Exemplified                                Example                                                                               photoreceptor 135      F.sub.1 -23                                                                          compound                                   135                                 [155]                                      Compar-                                                                               Comparative  Compound  Q.sub.1 -3,                                                                          Comparative                                ative  photoreceptor 33       F.sub.1 -23                                                                          compound (3)                               Example                                                                        33                                                                             Compar-                                                                               Comparative  Compound  Q.sub.1 -3,                                                                          Comparative                                ative  photoreceptor 34       F.sub.1 -23                                                                          compound (2)                               Example                                                                        34                                                                             ______________________________________                                    

                  TABLE-46                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 136                                                                           phthalocyanine                                                                               compound [2]                                 136                                                                            Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 137                                                                           phthalocyanine                                                                               compound                                     137                               [21]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 138                                                                           phthalocyanine                                                                               compound                                     138                               [37]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 139                                                                           phthalocyanine                                                                               compound                                     139                               [43]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 140                                                                           phthalocyanine                                                                               compound                                     140                               [47]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 141                                                                           phthalocyanine                                                                               compound                                     141                               [57]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 142                                                                           phthalocyanine                                                                               compound                                     142                               [70]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 143                                                                           phthalocyanine                                                                               compound                                     143                               [75]                                         Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 144                                                                           phthalocyanine                                                                               compound                                     144                               [102]                                        Inventive                                                                             Inventive    τ type non-metallic                                                                      Exemplified                                  Example                                                                               photoreceptor 145                                                                           phthalocyanine                                                                               compound                                     145                               [150]                                        Compar-                                                                               Comparative  τ  type non-metallic                                                                     Comparative                                  ative  photoreceptor 35                                                                            phthalocyanine                                                                               compound (3)                                 Example                                                                        35                                                                             Compar-                                                                               Comparative  τ type non-metallic                                                                      Comparative                                  ative  photoreceptor 36                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        36                                                                             ______________________________________                                    

                  TABLE-47                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 146                                                                           phthalocyanine                                                                               compound [6]                                 146                                                                            Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 147                                                                           phthalocyanine                                                                               compound                                     147                               [12]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 148                                                                           phthalocyanine                                                                               compound                                     148                               [21]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 149                                                                           phthalocyanine                                                                               compound                                     149                               [38]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 150                                                                           phthalocyanine                                                                               compound                                     150                               [47]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 151                                                                           phthalocyanine                                                                               compound                                     151                               [55]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 152                                                                           phthalocyanine                                                                               compound                                     152                               [72]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 153                                                                           phthalocyanine                                                                               compound                                     153                               [79]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 154                                                                           phthalocyanine                                                                               compound                                     154                               [88]                                         Inventive                                                                             Inventive    X type non-metallic                                                                          Exemplified                                  Example                                                                               photoreceptor 155                                                                           phthalocyanine                                                                               compound                                     155                               [104]                                        Compar-                                                                               Comparative  X type non-metallic                                                                          Comparative                                  ative  photoreceptor 37                                                                            phthalocyanine                                                                               compound (3)                                 Example                                                                        37                                                                             Compar-                                                                               Comparative  X type non-metallic                                                                          Comparative                                  ative  photoreceptor 38                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        38                                                                             ______________________________________                                    

    ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM           CTM                                          ______________________________________                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 156                                                                           phthalocyanine                                                                               compound [3]                                 156                                                                            Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 157                                                                           phthalocyanine                                                                               compound                                     157                               [12]                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 158                                                                           phthalocyanine                                                                               compound                                     158                               [26]                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 159                                                                           phthalocyanine                                                                               compound                                     159                               [50]                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 160                                                                           phthalocyanine                                                                               compound                                     160                               [71]                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 161                                                                           phthalocyanine                                                                               compound                                     161                               [73]                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 162                                                                           phthalocyanine                                                                               compound                                     162                               [93]                                         Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 163                                                                           phthalocyanine                                                                               compound                                     163                               [103]                                        Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 164                                                                           phthalocyanine                                                                               compound                                     164                               [116]                                        Inventive                                                                             Inventive    Y type oxytitanium                                                                           Exemplified                                  Example                                                                               photoreceptor 165                                                                           phthalocyanine                                                                               compound                                     165                               [150]                                        Compar-                                                                               Comparative  Y type oxytitanium                                                                           Comparative                                  ative  photoreceptor 39                                                                            phthalocyanine                                                                               compound (3)                                 Example                                                                        39                                                                             Compar-                                                                               Comparative  Y type oxytitanium                                                                           Comparative                                  ative  photoreceptor 40                                                                            phthalocyanine                                                                               compound (2)                                 Example                                                                        40                                                                             ______________________________________                                    

                  TABLE-49                                                         ______________________________________                                         Example                                                                               Photoreceptor                                                           No.    No.          CGM         CTM                                            ______________________________________                                         Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 166        compound [3]                                   166                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 167        compound [12]                                  167                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 168        compound [21]                                  168                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 169        compound [30]                                  169                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 170        compound [39]                                  170                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 171        compound [48]                                  171                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 172        compound [57]                                  172                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 173        compound [60]                                  173                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 174        compound [75]                                  174                                                                            Inventive                                                                             Inventive    Compound F.sub.2 -6                                                                        Exemplified                                    Example                                                                               photoreceptor 175        compound [84]                                  175                                                                            Compar-                                                                               Comparative  Compound F.sub.2 -6                                                                        Comparative                                    ative  photoreceptor 41         compound (3)                                   Example                                                                        41                                                                             Compar-                                                                               Comparative  Compound F.sub.2 -6                                                                        Comparative                                    ative  photoreceptor 42         compound (2)                                   Example                                                                        42                                                                             ______________________________________                                    

                  TABLE-50                                                         ______________________________________                                                        Vr (v) after 20000th repetition                                        Initial at the following linear velocity                                         white paper                                                                              Repetition                                                                               Repetition                                                                             Repetition                                Photorecep-                                                                             potential,                                                                               at 240    at 330  at 440                                    tor No.  Vw (v)    mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive                                                                               46        10        13      19                                        photoreceptor                                                                  106                                                                            Inventive                                                                               48        13        15      22                                        photoreceptor                                                                  107                                                                            Inventive                                                                               51        12        15      23                                        photoreceptor                                                                  108                                                                            Inventive                                                                               53        13        16      23                                        photoreceptor                                                                  109                                                                            Inventive                                                                               48        11        14      21                                        photoreceptor                                                                  110                                                                            Inventive                                                                               49        8         13      21                                        photoreceptor                                                                  111                                                                            Inventive                                                                               47        10        15      23                                        photoreceptor                                                                  112                                                                            Inventive                                                                               54        10        15      22                                        photoreceptor                                                                  113                                                                            Inventive                                                                               50        14        17      26                                        photoreceptor                                                                  114                                                                            Inventive                                                                               50        15        18      27                                        photoreceptor                                                                  115                                                                            Comparative                                                                             67        14        40      76                                        photoreceptor                                                                  29                                                                             Comparative                                                                             73        17        45      89                                        photoreceptor                                                                  30                                                                             ______________________________________                                    

                  TABLE-51                                                         ______________________________________                                                        Vr (v) after 20000th repetition                                        Initial at the following linear velocity                                         white paper                                                                              Repetition                                                                               Repetition                                                                             Repetition                                Photorecep-                                                                             potential,                                                                               at 240    at 330  at 440                                    tor No.  Vw (v)    mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive                                                                               102       11        15      25                                        photoreceptor                                                                  116                                                                            Inventive                                                                               100       12        15      23                                        photoreceptor                                                                  117                                                                            Inventive                                                                               97        15        18      26                                        photoreceptor                                                                  118                                                                            Inventive                                                                               103       11        14      22                                        photoreceptor                                                                  119                                                                            Inventive                                                                               97        12        16      23                                        photoreceptor                                                                  120                                                                            Inventive                                                                               96        9         13      21                                        photoreceptor                                                                  121                                                                            Inventive                                                                               107       13        18      27                                        photoreceptor                                                                  122                                                                            Inventive                                                                               95        10        13      21                                        photoreceptor                                                                  123                                                                            Inventive                                                                               101       9         12      22                                        photoreceptor                                                                  124                                                                            Inventive                                                                               104       10        14      24                                        photoreceptor                                                                  125                                                                            Comparative                                                                             118       13        40      78                                        photoreceptor                                                                  31                                                                             Comparative                                                                             121       15        39      79                                        photoreceptor                                                                  32                                                                             ______________________________________                                    

                  TABLE-52                                                         ______________________________________                                                        Vr (v) after 20000th repetition                                        Initial at the following linear velocity                                         white paper                                                                              Repetition                                                                               Repetition                                                                             Repetition                                Photorecep-                                                                             potential,                                                                               at 240    at 330  at 440                                    tor No.  Vw (v)    mm/sec.   mm/sec. mm/sec.                                   ______________________________________                                         Inventive                                                                               63        13        18      25                                        photoreceptor                                                                  126                                                                            Inventive                                                                               73        12        16      24                                        photoreceptor                                                                  127                                                                            Inventive                                                                               68        10        15      22                                        photoreceptor                                                                  128                                                                            Inventive                                                                               66        9         15      24                                        photoreceptor                                                                  129                                                                            Inventive                                                                               73        9         14      22                                        photoreceptor                                                                  130                                                                            Inventive                                                                               71        11        15      22                                        photoreceptor                                                                  131                                                                            Inventive                                                                               70        12        17      25                                        photoreceptor                                                                  132                                                                            Inventive                                                                               67        12        18      26                                        photoreceptor                                                                  133                                                                            Inventive                                                                               69        15        20      29                                        photoreceptor                                                                  134                                                                            Inventive                                                                               73        14        21      29                                        photoreceptor                                                                  135                                                                            Comparative                                                                             88        18        40      77                                        photoreceptor                                                                  33                                                                             Comparative                                                                             95        18        39      84                                        photoreceptor                                                                  34                                                                             ______________________________________                                    

                  TABLE-53                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white      white      white                                                    spot produced                                                                             spot produced                                                                             spot produced                                 Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             after 100000th                                No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          0                                             photoreceptor 106                                                              Inventive  0          1          1                                             photoreceptor 107                                                              Inventive  0          1          2                                             photoreceptor 108                                                              Inventive  0          0          0                                             photoreceptor 109                                                              Inventive  0          0          1                                             photoreceptor 110                                                              Inventive  0          0          0                                             photoreceptor 111                                                              Inventive  0          1          1                                             photoreceptor 112                                                              Inventive  0          0          0                                             photoreceptor 113                                                              Inventive  0          1          2                                             photoreceptor 114                                                              Inventive  0          1          1                                             photoreceptor 115                                                              Comparative                                                                               4          24         40                                            photoreceptor 29                                                               Comparative                                                                               4          19         37                                            photoreceptor 30                                                               ______________________________________                                    

                  TABLE-54                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white      white      white                                                    spot produced                                                                             spot produced                                                                             spot produced                                 Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             after 100000th                                No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          0          1                                             photoreceptor 116                                                              Inventive  0          0          2                                             photoreceptor 117                                                              Inventive  0          0          0                                             photoreceptor 118                                                              Inventive  0          0          0                                             photoreceptor 119                                                              Inventive  0          0          1                                             photoreceptor 120                                                              Inventive  0          0          0                                             photoreceptor 121                                                              Inventive  0          0          1                                             photoreceptor 122                                                              Inventive  0          1          2                                             photoreceptor 123                                                              Inventive  0          0          0                                             photoreceptor 124                                                              Inventive  0          1          3                                             photoreceptor 125                                                              Comparative                                                                               7          22         50                                            photoreceptor 31                                                               Comparative                                                                               4          25         47                                            photoreceptor 32                                                               ______________________________________                                    

                  TABLE-55                                                         ______________________________________                                                    Numbers of Numbers of Numbers of                                               white      white      white                                                    spot produced                                                                             spot produced                                                                             spot produced                                 Photoreceptor                                                                             after 10000th                                                                             after 50000th                                                                             after 100000th                                No.        repetition repetition repetition                                    ______________________________________                                         Inventive  0          1          2                                             photoreceptor 126                                                              Inventive  0          1          2                                             photoreceptor 127                                                              Inventive  0          0          0                                             photoreceptor 128                                                              Inventive  0          1          1                                             photoreceptor 129                                                              Inventive  0          0          1                                             photoreceptor 130                                                              Inventive  0          1          1                                             photoreceptor 131                                                              Inventive  0          1          2                                             photoreceptor 132                                                              Inventive  0          0          0                                             photoreceptor 133                                                              Inventive  0          0          3                                             photoreceptor 134                                                              Inventive  0          1          2                                             photoreceptor 135                                                              Comparative                                                                               5          22         44                                            photoreceptor 33                                                               Comparative                                                                               2          18         38                                            photoreceptor 34                                                               ______________________________________                                    

                  TABLE-56                                                         ______________________________________                                                    Ordinary temperature                                                                        Low temperature                                                   (25° C.)                                                                             (10° C.)                                        Photoreceptor No.                                                                            VH (v)  VL (v)    VH (v) VL (v)                                  ______________________________________                                         Inventive     710     101       711    101                                     photoreceptor 135                                                              Inventive     705     102       709    103                                     photoreceptor 137                                                              Inventive     697      99       699    102                                     photoreceptor 138                                                              Inventive     698     104       700    104                                     photoreceptor 139                                                              Inventive     693     105       697    107                                     photoreceptor 140                                                              Inventive     701     110       705    113                                     photoreceptor 141                                                              Inventive     705     113       706    114                                     photoreceptor 142                                                              Inventive     699     100       703    102                                     photoreceptor 143                                                              Inventive     700      98       704     99                                     photoreceptor 144                                                              Inventive     712     109       714    110                                     photoreceptor 145                                                              Comparative   690     120       677    165                                     photoreceptor 35                                                               Comparative   697     123       685    179                                     photoreceptor 36                                                               ______________________________________                                    

                  TABLE-57                                                         ______________________________________                                                    Ordinary temperature                                                                        Low temperature                                                   (25° C.)                                                                             (10° C.)                                        Photoreceptor No.                                                                            VH (v)  VL (v)    VH (v) VL (v)                                  ______________________________________                                         Inventive     721      95       719     98                                     photoreceptor 145                                                              Inventive     710      94       706     97                                     photoreceptor 147                                                              Inventive     725     105       721    107                                     photoreceptor 148                                                              Inventive     701     103       700    105                                     photoreceptor 149                                                              Inventive     705      92       700     95                                     photoreceptor 150                                                              Inventive     708      90       704     94                                     photoreceptor 151                                                              Inventive     718     105       710    109                                     photoreceptor 152                                                              Inventive     710     108       708    109                                     photoreceptor 153                                                              Inventive     724     107       720    110                                     photoreceptor 154                                                              Inventive     715     102       713    104                                     photoreceptor 155                                                              Comparative   712     125       678    174                                     photoreceptor 37                                                               Comparative   717     122       682    175                                     photoreceptor 38                                                               ______________________________________                                    

                  TABLE-58                                                         ______________________________________                                                    Ordinary temperature                                                                        Low temperature                                                   (25° C.)                                                                             (10° C.)                                        Photoreceptor No.                                                                            VH (v)  VL (v)    VH (v) VL (v)                                  ______________________________________                                         Inventive     712     50        715    51                                      photoreceptor 156                                                              Inventive     714     53        717    54                                      photoreceptor 157                                                              Inventive     718     54        721    56                                      photoreceptor 158                                                              Inventive     704     51        707    53                                      photoreceptor 159                                                              Inventive     720     55        722    57                                      photoreceptor 160                                                              Inventive     706     49        710    50                                      photoreceptor 161                                                              Inventive     701     47        704    49                                      photoreceptor 162                                                              Inventive     708     50        710    51                                      photoreceptor 163                                                              Inventive     712     51        713    52                                      photoreceptor 164                                                              Inventive     719     55        723    57                                      photoreceptor 165                                                              Comparative   718     57        690    88                                      photoreceptor 39                                                               Comparative   715     59        685    81                                      photoreceptor 40                                                               ______________________________________                                    

                  TABLE-59                                                         ______________________________________                                                    Ordinary temperature                                                                        Low temperature                                                   (25° C.)                                                                             (10° C.)                                        Photoreceptor No.                                                                            VH (v)  VL (v)    VH (v) VL (v)                                  ______________________________________                                         Inventive     718     108       717    110                                     photoreceptor 166                                                              Inventive     701     104       702    108                                     photoreceptor 167                                                              Inventive     708     110       709    112                                     photoreceptor 168                                                              Inventive     710     100       710    104                                     photoreceptor 169                                                              Inventive     711      98       710    100                                     photoreceptor 170                                                              Inventive     716     101       715    105                                     photoreceptor 171                                                              Inventive     702     105       702    107                                     photoreceptor 172                                                              Inventive     707      97       706    100                                     photoreceptor 173                                                              Inventive     710      95       711     99                                     photoreceptor 174                                                              Inventive     715     103       714    106                                     photoreceptor 175                                                              Comparative   701     118       671    150                                     photoreceptor 41                                                               Comparative   708     126       683    148                                     photoreceptor 42                                                               ______________________________________                                    

                  TABLE-60                                                         ______________________________________                                                     Black spot Black spot Black spot                                               judgement  judgement  judgement                                                made after made after made after                                   Photoreceptor                                                                              20000th    50000th    100000th                                     used        copies     copies     copies                                       ______________________________________                                         Inventive   ⊚                                                                          ◯                                                                             ◯                                photoreceptor 136                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 137                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 138                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 139                                                              Inventive   ⊚                                                                          ◯                                                                             ◯                                photoreceptor 140                                                              Inventive   ⊚                                                                          ◯                                                                             ◯                                photoreceptor 141                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 142                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 143                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 144                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 145                                                              Comparative ◯                                                                             Δ    X                                            photoreceptor 35                                                               Comparative ◯                                                                             Δ    X                                            photoreceptor 36                                                               ______________________________________                                    

                  TABLE-61                                                         ______________________________________                                                     Black spot Black spot Black spot                                               judgement  judgement  judgement                                                made after made after made after                                   Photoreceptor                                                                              20000th    50000th    100000th                                     used        copies     copies     copies                                       ______________________________________                                         Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 146                                                              Inventive   ⊚                                                                          ⊚                                                                          ◯                                photoreceptor 147                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 148                                                              Inventive   ⊚                                                                          ⊚                                                                          ◯                                photoreceptor 149                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 150                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 151                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 152                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 153                                                              Inventive   ⊚                                                                          ⊚                                                                          ◯                                photoreceptor 154                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 155                                                              Comparative ◯                                                                             Δ    X                                            photoreceptor 37                                                               Comparative ◯                                                                             Δ    Δ                                      photoreceptor 38                                                               ______________________________________                                    

                  TABLE-62                                                         ______________________________________                                                     Black spot Black spot Black spot                                               judgement  judgement  judgement                                                made after made after made after                                   Photoreceptor                                                                              20000th    50000th    100000th                                     used        copies     copies     copies                                       ______________________________________                                         Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 156                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 157                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 158                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 159                                                              Inventive   ⊚                                                                          ⊚                                                                          ◯                                photoreceptor 160                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 161                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 162                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 163                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 164                                                              Inventive   ⊚                                                                          ⊚                                                                          ◯                                photoreceptor 165                                                              Comparative ◯                                                                             Δ    Δ                                      photoreceptor 39                                                               Comparative ◯                                                                             Δ    X                                            photoreceptor 40                                                               ______________________________________                                    

                  TABLE-63                                                         ______________________________________                                                     Black spot Black spot Black spot                                               judgement  judgement  judgement                                                made after made after made after                                   Photoreceptor                                                                              20000th    50000th    100000th                                     used        copies     copies     copies                                       ______________________________________                                         Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 166                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 167                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 168                                                              Inventive   ⊚                                                                          ⊚                                                                          ◯                                photoreceptor 169                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 170                                                              Inventive   ⊚                                                                          ◯                                                                             ◯                                photoreceptor 171                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 172                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 173                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 174                                                              Inventive   ⊚                                                                          ⊚                                                                          ⊚                             photoreceptor 175                                                              Comparative ◯                                                                             Δ    X                                            photoreceptor 41                                                               Comparative ◯                                                                             Δ    X                                            photoreceptor 42                                                               ______________________________________                                    

As described above, when any electrophotographic photoreceptor relating to the invention is incorporated into a copier or printer and is then used repeatedly, every highly photoreceptive and excellent image can be provided without producing any image defect or image failure such as white-dots, black-dots, fog and density lowering.

Even when any electrophotographic photoreceptor relating to the invention is incorporated into a copier or printer and then used repeatedly, every excellent image can be provided with a reduced residual potential and without producing any image defect and image failure.

EXAMPLE 176

Next, an example different from the above-given examples, in which the invention was applied to an electroluminescence (EL), will be detailed.

Over to a transparent electrode (that was a layer made of indium and tin oxide) formed on a glass-made substrate, Exemplified Compound No.6 was so vacuum-evaporated as to serve as the electric charge injecting layer so that the thickness thereof could be 500 å. Next, an 8-quinolinol A1 complex (A1q₃) was vacuum-evaporated so as to serve as the organic fluorescent layer so that the thickness thereof could be 600 å. Further, a magnesium/silver alloy was vacuum-evaporated thereon so as to serve as the negative electrode thereof.

When checking up the light emitting characteristics of the resulting thin organic EL element, a light emission of 0.04 mW/cm² could be obtained at 4 mA/cm². The emitted light was in yellowish green.

EXAMPLE 177

A thin organic EL element was prepared in the same manner as in Example 176, except that the electric-charge injecting layer used in Example 176 was replaced by Exemplified Compound No. (14) having 500 å so as to serve as the electric-charge injecting layer thereof, (provided, therein the negative electrode was made of a magnesium/aluminium alloy). When checking up the resulting light emitting characteristics thereof, the resulting light emission of 0.05 mW/cm² could be obtained at 5 mA/cm². The emitted light was in yellowish green.

EXAMPLE 178

A thin organic EL element was prepared in the same manner as in Example 176, except that the electric-charge injecting layer used in Example 176 was replaced by Exemplified Compound No. [21] having 500 å so as to serve as the electric-charge injecting layer thereof, (provided, therein the negative electrode was made of a magnesium/aluminium alloy). When checking up the resulting light emitting characteristics thereof, the resulting light emission of 0.06 mW/cm² could be obtained at 6 mA/cm². The emitted light was in yellowish green.

Examples of Compounds having Formula [I]

    ______________________________________                                          ##STR16##                                                                     No.   R.sup.1                                                                               R.sup.2                                                                               R.sup.3                                                                             R.sup.4                                                                             R.sup.5                                                                             R.sup.6                                                                             R.sup.7                                                                             R.sup.5'                                                                           R.sup.6'                                                                           R.sup.7'                  ______________________________________                                         1     CH.sub.3                                                                              H      H    H    CH.sub.3                                                                            H    H    H   H   H                         2     CH.sub.3                                                                              H      H    H    H    CH.sub.3                                                                            H    H   H   H                         3     CH.sub.3                                                                              H      H    H    H    H    CH.sub.3                                                                            H   H   H                         4     H      CH.sub.3                                                                              H    H    CH.sub.3                                                                            H    H    H   H   H                         5     H      CH.sub.3                                                                              H    H    H    CH.sub.3                                                                            H    H   H   H                         6     H      CH.sub.3                                                                              H    H    H    H    CH.sub.3                                                                            H   H   H                         7     H      H      CH.sub.3                                                                            H    CH.sub.3                                                                            H    H    H   H   H                         8     H      H      CH.sub.3                                                                            H    H    CH.sub.3                                                                            H    H   H   H                         9     H      H      CH.sub.3                                                                            H    H    H    CH.sub.3                                                                            H   H   H                         10    H      H      H    CH.sub.3                                                                            CH.sub.3                                                                            H    H    H   H   H                         11    H      H      H    CH.sub.3                                                                            H    CH.sub.3                                                                            H    H   H   H                         12    H      H      H    CH.sub.3                                                                            H    H    CH.sub.3                                                                            H   H   H                         ______________________________________                                    

Examples of Compounds having Formula [I]

    ______________________________________                                          ##STR17##                                                                     No.    R.sup.1 -R.sup.4                                                                           R.sup.5 -R.sup.9                                                                           R.sup.5' -R.sup.9'                              ______________________________________                                         13     3-CH.sub.3  2-C.sub.2 H.sub.5                                                                          H                                               14     3-CH.sub.3  3-C.sub.2 H.sub.5                                                                          H                                               15     3-CH.sub.3  4-C.sub.2 H.sub.5                                                                          H                                               16     3-CH.sub.3  4-C.sub.2 H.sub.5                                                                          4-C.sub.2 H.sub.5                               17     3-CH.sub.3  2-F         H                                               18     3-CH.sub.3  3-F         H                                               19     3-CH.sub.3  4-F         H                                               20     3-CH.sub.3  2-Cl        2, 4-di-CH.sub. 3                               21     3-CH.sub.3  4-Cl        H                                               22     3-CH.sub.3  3-Br        H                                               23     3-CH.sub.3  4-I         H                                               24     3-CH.sub.3  4-CF.sub.3  H                                               25     3-CH.sub.3  4-CN        H                                               26     3-CH.sub.3  4-CH.sub.2 COOCH.sub.3                                                                     H                                               27     3-CH.sub.3  3-OCOC.sub.2 H.sub.5                                                                       H                                               28     3-CH.sub.3  3-C.sub.2 H.sub.5                                                                          4-C.sub.2 H.sub.5                               29     3-CH.sub.3  2-CH.sub.3, 4-Cl                                                                           H                                               30     3-CH.sub.3                                                                                  ##STR18##  H                                               31     3-CH.sub.3  4-OCH.sub.3 H                                               32     3-CH.sub.3  4-OCH.sub.3 4-OCH.sub.3                                     33     3-CH.sub.3  4-OC.sub.2 H.sub.5                                                                         H                                               ______________________________________                                    

Examples of Compounds having Formula [I]

    ______________________________________                                          ##STR19##                                                                     No.    R.sup.1 -R.sup.4                                                                           R.sup.5 -R.sup.9                                                                            R.sup.5' -R.sup.9'                             ______________________________________                                         34     4-CH.sub.3  4-OCH.sub.3  H                                              35     4-CH.sub.3  4-OCH.sub.3  4-OCH.sub.3                                    36     4-CH.sub.3  4-OCH.sub.3  4-CH.sub.3                                     37     4-CH.sub.3  4-Cl         H                                              38     4-CH.sub.3  3-Br         H                                              39     4-CH.sub.3  2-CN         H                                              40     4-CH.sub.3  3-C.sub.2 H.sub.4 COOCH.sub.3                                                               H                                              41     4-CH.sub.3  3-CF.sub.3   H                                              42     4-CH.sub.3                                                                                  ##STR20##   H                                              43     4-CH.sub.3                                                                                  ##STR21##   H                                              44     4-CH.sub.3                                                                                  ##STR22##   H                                              45     4-CH.sub.3  4-Cl         4-Cl                                           46     4-CH.sub.3  2,3,4,5,6-per-F                                                                             H                                              47     4-CH.sub.3  2,4-di-Cl    H                                              48     4-CH.sub.3  4-C.sub.2 H.sub.5                                                                           4-C.sub.2 H.sub.5                              49     4-CH.sub.3  3,4,5-tri-OCH.sub.3                                                                         H                                              50     4-CH.sub.3  4-OH         H                                              51     4-CH.sub.3  2,4-di-OCH.sub.3                                                                            H                                              52     4-CH.sub.3  4-Cl         3-Br                                           53     4-CH.sub.3  4-CH.sub.3   3-Cl                                           54     4-CH.sub.3  2,4-di-CH.sub.3                                                                             4-OCH.sub.3                                    ______________________________________                                    

Examples of Compounds having Formula [I]

    ______________________________________                                          ##STR23##                                                                     No.     R.sup.1 -R.sup.4                                                                           R.sup.5 -R.sup.9                                                                           R.sup.5' -R.sup.9'                             ______________________________________                                         55      5-CH.sub.3  4-OCH.sub.3 H                                              56      5-CH.sub.3  4-OCH.sub.3 4-OCH.sub.3                                    57      5-CH.sub.3  4-Cl        H                                              58      5-CH.sub.3  3-Cl        H                                              59      5-CH.sub.3  2-Cl        H                                              60      5-CH.sub.3  4-Cl        4-Cl                                           61      5-CH.sub.3                                                                                  ##STR24##  H                                              62      5-CH.sub.3  4-CF.sub. 3 H                                              63      5-CH.sub.3  4-CN        H                                              64      5-CH.sub.3                                                                                  ##STR25##  H                                              65      5-CH.sub.3  2,4-di-Cl   H                                              66      6-CH.sub.3  4-OCH.sub.3 H                                              67      6-CH.sub.3  4-OCH.sub.3 4-OCH.sub.3                                    68      6-CH.sub.3  4-Cl        H                                              69      6-CH.sub.3  3-Br        H                                              70      6-CH.sub.3  4-I         4-CH.sub.3                                     71      6-CH.sub.3  2,4-di-F    H                                              72      6-CH.sub.3  2-CH.sub.3  4-Cl                                           73      6-CH.sub.3  2-CN        4-CN                                           74      6-CH.sub.3                                                                                  ##STR26##  H                                              75      6-CH.sub.3                                                                                  ##STR27##  H                                              ______________________________________                                    

Examples of Compounds having Formula [I] ##STR28##

Examples of Compounds having Formula [I] ##STR29##

Examples of Compounds having Formula [I] ##STR30##

Synthesis Example: Synthesis of Exemplified Compound No. 6 ##STR31##

Examples of Compounds having Formula [II]

    __________________________________________________________________________      ##STR32##                                                                     Compound                                                                       No.   R.sup.a   R.sup.b     R.sup.c                                            __________________________________________________________________________      (1)  3rd positioned CH.sub.3,                                                                 1-6th positioned H                                                                         1-6th positioned H                                       4-5th positioned H                                                        (2)  3rd positioned CH.sub.3,                                                                 1-6th positioned H                                                                         2nd positioned CH.sub.3,                                 4-5th positioned H    the other positioned Hs                             (3)  3rd positioned CH.sub.3,                                                                 1-6th positioned H                                                                         3rd positioned CH.sub.3,                                 4-5th positioned H    the other positioned Hs                             (4)  3rd positioned CH.sub.3,                                                                 1-6th positioned H                                                                         4th positioned CH.sub.3,                                 4-5th positioned H    the other positioned Hs                             (5)  3rd positioned CH.sub.3,                                                                 2nd positioned CH.sub.3,                                                                   2nd positioned CH.sub.3,                                 4-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                             (6)  3rd positioned CH.sub.3,                                                                 2nd positioned CH.sub.3,                                                                   3rd positioned CH.sub.3,                                 4-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                             (7)  3rd positioned CH.sub.3,                                                                 2nd positioned CH.sub.3,                                                                   4th positioned CH.sub.3,                                 4-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                             (8)  3rd positioned CH.sub.3,                                                                 3rd positioned CH.sub.3,                                                                   3rd positioned CH.sub.3,                                 4-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                             (9)  3rd positioned CH.sub.3,                                                                 3rd positioned CH.sub.3,                                                                   4th positioned CH.sub.3,                                 4-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (10)  3rd positioned CH.sub.3,                                                                 4th positioned CH.sub.3,                                                                   4th positioned CH.sub.3,                                 4-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (11)  4th positioned CH.sub.3,                                                                 1-6th positioned H                                                                         1-6th positioned H                                       3-5th positioned H                                                       (12)  4th positioned CH.sub.3,                                                                 1-6th positioned H                                                                         2nd positioned CH.sub.3,                                 3-5th positioned H    the other positioned Hs                            (13)  4th positioned CH.sub.3,                                                                 1-6th positioned H                                                                         3rd positioned CH.sub.3,                                 3-5th positioned H    the other positioned Hs                            (14)  4th positioned CH.sub.3,                                                                 1-6th positioned H                                                                         4th positioned CH.sub.3,                                 3-5th positioned H    the other positioned Hs                            (15)  4th positioned CH.sub.3,                                                                 2nd positioned CH.sub.3,                                                                   2nd positioned CH.sub.3,                                 3-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (16)  4th positioned CH.sub.3,                                                                 2nd positioned CH.sub.3,                                                                   3rd positioned CH.sub.3,                                 3-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (17)  4th positioned CH.sub.3,                                                                 2nd positioned CH.sub.3,                                                                   4th positioned CH.sub.3,                                 3-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (18)  4th positioned CH.sub.3,                                                                 3rd positioned CH.sub.3,                                                                   3rd positioned CH.sub.3,                                 3-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (19)  4th positioned CH.sub.3,                                                                 3rd positioned CH.sub.3,                                                                   4th positioned CH.sub.3,                                 3-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            (20)  4th positioned CH.sub.3,                                                                 4th positioned CH.sub.3,                                                                   4th positioned CH.sub.3,                                 3-5th positioned H                                                                       the other positioned Hs                                                                    the other positioned Hs                            __________________________________________________________________________

Examples of Compounds having Formula [II] ##STR33##

Examples of Compounds having Formula [II] ##STR34##

Examples of Compounds having Formula [II]

    ______________________________________                                          ##STR35##                                                                     No.    R.sup.1 -R.sup.3                                                                           R.sup.4 -R.sup.8                                                                           R.sup.4' -R.sup.8'                              ______________________________________                                         (29)   3-CH.sub.3  4-C.sub.2 H.sub.5                                                                          H                                               (30)   3-CH.sub.3  5-C.sub.2 H.sub.5                                                                          H                                               (31)   3-CH.sub.3  6-C.sub.2 H.sub.5                                                                          H                                               (32)   3-CH.sub.3  6-C.sub.2 H.sub.5                                                                          6'-C.sub.2 H.sub.5                              (33)   3-CH.sub.3  4-F         H                                               (34)   3-CH.sub.3  5-F         H                                               (35)   3-CH.sub.3  6-F         H                                               (36)   3-CH.sub.3  4-Cl        4' ,6'-di-CH.sub.3                              (37)   3-CH.sub.3  6-Cl        H                                               (38)   3-CH.sub.3  5-Br        H                                               (39)   3-CH.sub.3  6-I         H                                               (40)   3-CH.sub.3  6-CF.sub.3  H                                               (41)   3-CH.sub.3  6-CN        H                                               (42)   3-CH.sub.3  6-CH.sub.2 COOCH.sub.3                                                                     H                                               (43)   3-CH.sub.3  5-OCOC.sub.2 H.sub.5                                                                       H                                               (44)   3-CH.sub.3  5,6-di-CH.sub.3                                                                            H                                               (45)   3-CH.sub.3  4-CH.sub.3,6-Cl                                                                            H                                               (46)   3-CH.sub.3                                                                                  ##STR36##  H                                               (47)   3-CH.sub.3  6-OCH.sub.3 H                                               (48)   3-CH.sub.3  6-OCH.sub.3 6'-OCH.sub.3                                    (49)   3-CH.sub.3  6-OC.sub.2 H.sub.5                                                                         H                                               ______________________________________                                    

Examples of Compounds having Formula [II]

    ______________________________________                                          ##STR37##                                                                     No.    R.sup.1 -R.sup.3                                                                           R.sup.4 -R.sup.8                                                                            R.sup.4' -R.sup.8'                             ______________________________________                                         (50)   4-CH.sub.3  6-OCH.sub.3  H                                              (51)   4-CH.sub.3  6-OCH.sub.3  6'-OCH.sub.3                                   (52)   4-CH.sub.3  6-OCH.sub.3  6'-CH.sub.3                                    (53)   4-CH.sub.3  6-Cl         H                                              (54)   4-CH.sub.3  5-Br         H                                              (55)   4-CH.sub.3  4-CN         H                                              (56)   4-CH.sub.3  5-C.sub.2 H.sub.4 COOCH.sub.3                                                               H                                              (57)   4-CH.sub.3  5-CF.sub.3   H                                              (58)   4-CH.sub. 3                                                                                 ##STR38##   H                                              (59)   4-CH.sub.3                                                                                  ##STR39##   H                                              (60)   4-CH.sub.3                                                                                  ##STR40##   H                                              (61)   4-CH.sub.3  6-Cl         6'-Cl                                          (62)   4-CH.sub.3  4,5,6,7,8-per-F                                                                             H                                              (63)   4-CH.sub.3  4,6-di-Cl    H                                              (64)   4-CH.sub.3  6-C.sub.2 H.sub.5                                                                           6'-C.sub.2 H.sub.5                             (65)   4-CH.sub.3  5,6,7-tri-OCH.sub.3                                                                         H                                              (66)   4-CH.sub.3  6-OH         H                                              (67)   4-CH.sub.3  4,6-di-OCH.sub.3                                                                            H                                              (68)   4-CH.sub.3  6-Cl         5'-Br                                          (69)   4-CH.sub.3  6-CH.sub.3   5'-Cl                                          (70)   4-CH.sub.3  4,6-di-CH.sub.3                                                                             6'-OCH.sub.3                                   ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR41##                                                                     Compound                                                                       No.        R.sup.1      R       R'                                             ______________________________________                                          [1]       OC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             H                                               [2]       OC.sub.2 H.sub.5                                                                            m-CH.sub.3                                                                             H                                               [3]       OC.sub.2 H.sub.5                                                                            p-CH.sub.3                                                                             H                                               [4]       OC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             o-CH.sub.3                                      [5]       OC.sub.2 H.sub.5                                                                            m-CH.sub.3                                                                             m-CH.sub.3                                      [6]       OC.sub.2 H.sub.5                                                                            p-CH.sub.3                                                                             p-CH.sub.3                                      [7]       OC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             m-CH.sub.3                                      [8]       OC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             p-CH.sub.3                                      [9]       OC.sub.2 H.sub.5                                                                            m-CH.sub.3                                                                             p-CH.sub.3                                     [10]       m-C.sub.2 H.sub.5                                                                           o-CH.sub.3                                                                             H                                              [11]       m-C.sub.2 H.sub.5                                                                           m-CH.sub.3                                                                             H                                              [12]       m-C.sub.2 H.sub.5                                                                           p-CH.sub.3                                                                             H                                              [13]       m-C.sub.2 H.sub.5                                                                           o-CH.sub.3                                                                             o-CH.sub.3                                     [14]       m-C.sub.2 H.sub.5                                                                           m-CH.sub.3                                                                             m-CH.sub.3                                     [15]       m-C.sub.2 H.sub.5                                                                           p-CH.sub.3                                                                             p-CH.sub.3                                     [16]       m-C.sub.2 H.sub.5                                                                           o-CH.sub.3                                                                             m-CH.sub.3                                     [17]       m-C.sub.2 H.sub.5                                                                           o-CH.sub.3                                                                             p-CH.sub.3                                     [18]       m-C.sub.2 H.sub.5                                                                           m-CH.sub.3                                                                             p-CH.sub.3                                     ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR42##                                                                     Compound                                                                       No.        R.sup.1      R       R'                                             ______________________________________                                         [19]       PC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             H                                              [20]       PC.sub.2 H.sub.5                                                                            m-CH.sub.3                                                                             H                                              [21]       PC.sub.2 H.sub.5                                                                            p-CH.sub.3                                                                             H                                              [22]       PC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             o-CH.sub.3                                     [23]       PC.sub.2 H.sub.5                                                                            m-CH.sub.3                                                                             m-CH.sub.3                                     [24]       PC.sub.2 H.sub.5                                                                            p-CH.sub.3                                                                             p-CH.sub.3                                     [25]       PC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             m-CH.sub.3                                     [26]       PC.sub.2 H.sub.5                                                                            o-CH.sub.3                                                                             p-CH.sub.3                                     [27]       PC.sub.2 H.sub.5                                                                            m-CH.sub.3                                                                             p-CH.sub.3                                     [28]       o-n-C.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             H                                              [29]       o-n-C.sub.3 H.sub.7                                                                         m-CH.sub. 3                                                                            H                                              [30]       o-n-C.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             H                                              [31]       o-n-C.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                     [32]       o-n-C.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                     [33]       o-n-C.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                     [34]       o-n-C.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                     [35]       o-n-C.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                     [36]       o-n-C.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                     ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR43##                                                                     Compound                                                                       No.        R.sup.1      R       R'                                             ______________________________________                                         [37]       m-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             H                                              [38]       m-C.sub.3 H.sub.7                                                                           m-CH.sub.3                                                                             H                                              [39]       m-C.sub.3 H.sub.7                                                                           p-CH.sub.3                                                                             H                                              [40]       m-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             o-CH.sub.3                                     [41]       m-C.sub.3 H.sub.7                                                                           m-CH.sub.3                                                                             m-CH.sub.3                                     [42]       m-C.sub.3 H.sub.7                                                                           p-CH.sub.3                                                                             p-CH.sub.3                                     [43]       m-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             m-CH.sub.3                                     [44]       m-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             p-CH.sub.3                                     [45]       m-C.sub.3 H.sub.7                                                                           m-CH.sub.3                                                                             p-CH.sub.3                                     [46]       p-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             H                                              [47]       p-C.sub.3 H.sub.7                                                                           m-CH.sub.3                                                                             H                                              [48]       p-C.sub.3 H.sub.7                                                                           p-CH.sub.3                                                                             H                                              [49]       p-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             o-CH.sub.3                                     [50]       p-C.sub.3 H.sub.7                                                                           m-CH.sub.3                                                                             m-CH.sub.3                                     [51]       p-C.sub.3 H.sub.7                                                                           p-CH.sub.3                                                                             p-CH.sub.3                                     [52]       p-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             m-CH.sub.3                                     [53]       p-C.sub.3 H.sub.7                                                                           o-CH.sub.3                                                                             p-CH.sub.3                                     [54]       p-C.sub.3 H.sub.7                                                                           m-CH.sub.3                                                                             p-CH.sub.3                                     ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR44##                                                                     Compound                                                                       No.        R.sup.1       R       R'                                            ______________________________________                                         [55]       o-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             H                                             [56]       o-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             H                                             [57]       o-isoC.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             H                                             [58]       o-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                    [59]       o-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                    [60]       o-isoC.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                    [61]       o-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                    [62]       o-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                    [63]       o-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                    [64]       m-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             H                                             [65]       m-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             H                                             [66]       m-isoC.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             H                                             [67]       m-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                    [68]       m-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                    [69]       m-isoC.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                    [70]       m-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                    [71]       m-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                    [72]       m-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                    ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR45##                                                                     Compound                                                                       No.        R.sup.1       R       R'                                            ______________________________________                                         [73]       p-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             H                                             [74]       p-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             H                                             [75]       p-isoC.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             H                                             [76]       p-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                    [77]       p-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                    [78]       p-isoC.sub.3 H.sub.7                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                    [79]       p-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                    [80]       p-isoC.sub.3 H.sub.7                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                    [81]       p-isoC.sub.3 H.sub.7                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                    [82]       o-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             H                                             [83]       o-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             H                                             [84]       o-n-C.sub.4 H.sub.9                                                                          p-CH.sub.3                                                                             H                                             [85]       o-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             o-CH.sub.3                                    [86]       o-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             m-CH.sub.3                                    [87]       o-n-C.sub.4 H.sub.9                                                                          p-CH.sub.3                                                                             p-CH.sub.3                                    [88]       o-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             m-CH.sub.3                                    [89]       o-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             p-CH.sub.3                                    [90]       o-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             p-CH.sub.3                                    ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR46##                                                                     Compound                                                                       No.        R.sup.1       R       R'                                            ______________________________________                                          [91]      m-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             H                                              [92]      m-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             H                                              [93]      m-n-C.sub.4 H.sub.9                                                                          p-CH.sub.3                                                                             H                                              [94]      m-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             o-CH.sub.3                                     [95]      m-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             m-CH.sub.3                                     [96]      m-n-C.sub.4 H.sub.9                                                                          p-CH.sub.3                                                                             p-CH.sub.3                                     [97]      m-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             m-CH.sub.3                                     [98]      m-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             p-CH.sub.3                                     [99]      m-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             p-CH.sub.3                                    [100]      p-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             H                                             [101]      p-n-C.sub.4 H.sub.9                                                                          m-CH.sub. 3                                                                            H                                             [102]      p-n-C.sub.4 H.sub.9                                                                          p-CH.sub.3                                                                             H                                             [103]      p-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             o-CH.sub.3                                    [104]      p-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             m-CH.sub.3                                    [105]      p-n-C.sub.4 H.sub.9                                                                          p-CH.sub.3                                                                             p-CH.sub.3                                    [106]      p-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             m-CH.sub.3                                    [107]      p-n-C.sub.4 H.sub.9                                                                          o-CH.sub.3                                                                             p-CH.sub.3                                    [108]      p-n-C.sub.4 H.sub.9                                                                          m-CH.sub.3                                                                             p-CH.sub.3                                    ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR47##                                                                     Compound                                                                       No.        R.sup.1       R       R'                                            ______________________________________                                         [109]      o-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             H                                             [110]      o-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             H                                             [111]      o-terC.sub.4 H.sub.9                                                                         p-CH.sub.3                                                                             H                                             [112]      o-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                    [113]      o-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                    [114]      o-terC.sub.4 H.sub.9                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                    [115]      o-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                    [116]      o-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                    [117]      o-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                    [118]      m-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             H                                             [119]      m-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             H                                             [120]      m-terC.sub.4 H.sub.9                                                                         p-CH.sub.3                                                                             H                                             [121]      m-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                    [122]      m-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                    [123]      m-terC.sub.4 H.sub.9                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                    [124]      m-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                    [125]      m-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                    [126]      m-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                    ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR48##                                                                     Compound                                                                       No.        R.sup.1       R       R'                                            ______________________________________                                         [127]      p-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             H                                             [128]      p-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             H                                             [129]      p-terC.sub.4 H.sub.9                                                                         p-CH.sub.3                                                                             H                                             [130]      p-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             o-CH.sub.3                                    [131]      p-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             m-CH.sub.3                                    [132]      p-terC.sub.4 H.sub.9                                                                         p-CH.sub.3                                                                             p-CH.sub.3                                    [133]      p-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             m-CH.sub.3                                    [134]      p-terC.sub.4 H.sub.9                                                                         o-CH.sub.3                                                                             p-CH.sub.3                                    [135]      p-terC.sub.4 H.sub.9                                                                         m-CH.sub.3                                                                             p-CH.sub.3                                    ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR49##                                                                     Compound                                                                       No.       R.sup.1   Ar.sup.1      Ar.sup.2                                     ______________________________________                                         [136]     p-C.sub.2 H.sub.5                                                                         ##STR50##                                                                                    ##STR51##                                   [137]     p-C.sub.2 H.sub.5                                                                         ##STR52##                                                                                    ##STR53##                                   [138]     p-C.sub.2 H.sub.5                                                                         ##STR54##                                                                                    ##STR55##                                   [139]     p-C.sub.2 H.sub.5                                                                         ##STR56##                                                                                    ##STR57##                                   [140]     p-C.sub.2 H.sub.5                                                                         ##STR58##                                                                                    ##STR59##                                   [141]     p-C.sub.2 H.sub.5                                                                         ##STR60##                                                                                    ##STR61##                                   [142]     p-C.sub.2 H.sub.5                                                                         ##STR62##                                                                                    ##STR63##                                   [143]     p-C.sub.2 H.sub.5                                                                         ##STR64##                                                                                    ##STR65##                                   [144]     p-C.sub.2 H.sub.5                                                                         ##STR66##                                                                                    ##STR67##                                   [145]     p-C.sub.2 H.sub.5                                                                         ##STR68##                                                                                    ##STR69##                                   ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR70##                                                                     Compound                                                                       No.     R.sup.1 Ar.sup.1         Ar.sup.2                                      ______________________________________                                         [146]   p-C.sub.2 H.sub.5                                                                       ##STR71##                                                                                       ##STR72##                                    [147]   p-C.sub.2 H.sub.5                                                                       ##STR73##                                                                                       ##STR74##                                    [148]   p-C.sub.3 H.sub.7                                                                       ##STR75##                                                                                       ##STR76##                                    [149]   p-C.sub.3 H.sub.7                                                                       ##STR77##                                                                                       ##STR78##                                    [150]   p-C.sub.2 H.sub.5                                                                       ##STR79##                                                                                       ##STR80##                                    [151]   p-C.sub.2 H.sub.5                                                                       ##STR81##                                                                                       ##STR82##                                    [152]   p-C.sub.2 H.sub.5                                                                       ##STR83##                                                                                       ##STR84##                                    [153]   p-C.sub.2 H.sub.5                                                                       ##STR85##                                                                                       ##STR86##                                    [154]   p-C.sub.2 H.sub.5                                                                       ##STR87##                                                                                       ##STR88##                                    [155]   p-C.sub.2 H.sub.5                                                                       ##STR89##                                                                                       ##STR90##                                    ______________________________________                                    

Examples of Compounds having Formula [III]

    ______________________________________                                          ##STR91##                                                                     Com-                                                                           pound                                                                          No.   R.sup.1   Ar.sup.1      Ar.sup.2                                         ______________________________________                                         [156] p-C.sub.2 H.sub.5                                                                         ##STR92##                                                                                    ##STR93##                                       [157] p-C.sub.3 H.sub.7                                                                         ##STR94##                                                                                    ##STR95##                                       [158] p-isoC.sub.3 H.sub.7                                                                      ##STR96##                                                                                    ##STR97##                                       [159] p-terC.sub.4 H.sub.9                                                                      ##STR98##                                                                                    ##STR99##                                       [160] o-C.sub.2 H.sub.5                                                                         ##STR100##                                                                                   ##STR101##                                      [161] p-C.sub.3 H.sub.7                                                                         ##STR102##                                                                                   ##STR103##                                      [162] o-C.sub.2 H.sub.5                                                                         ##STR104##                                                                                   ##STR105##                                      [163] o-isoC.sub.3 H.sub.7                                                                      ##STR106##                                                                                   ##STR107##                                      [164] p-C.sub.4 H.sub.9                                                                         ##STR108##                                                                                   ##STR109##                                      [165] p-C.sub.2 H.sub.5                                                                         ##STR110##                                                                                   ##STR111##                                      ______________________________________                                          ##STR112##

(wherein X₁ and X₂ represent each a halogen atom, an alkyl group, an alkoxy group, a nitro group, a cyano group, a hydroxy group or a substituted or non-substituted amino group; p and q are each an integer of 0, 1, or 2, provided, p and q are each an integer of 2, X₁ and X₂ may be the same with or the different from each other; and A represents a group represented by the following Formula [F₁ -1]; ##STR113##

(wherein Ar represents a fluorohydrocarbon group, or an aromatic carbocyclic group or an aromatic heterocyclic group having a substituent; Z represents a group consisting of the non-metal atoms each necessary to form a substituted or non-substituted aromatic carbon ring or a substituted or non-substituted aromatic heterocyclic ring; and

m and n are each an integer of 0, 1 or 2, provided m and n are each an integer of 0 at the same time.)

    __________________________________________________________________________      ##STR114##                                                                           Sample Nos.                                                                           A                                                                __________________________________________________________________________            F.sub.1 -1                                                                             ##STR115##                                                             F.sub.1 -2                                                                             ##STR116##                                                             F.sub.1 -3                                                                             ##STR117##                                                             F.sub.1 -4                                                                             ##STR118##                                                             F.sub.1 -5                                                                             ##STR119##                                                      __________________________________________________________________________      ##STR120##                                                                         Azo group                                                                      substituted                                                               No.  position                                                                               X.sub.1 a                                                                          X.sub.1 b                                                                         X.sub.2 a                                                                          X.sub.2 b                                                                         R.sub.1 '                                                                         R.sub.2 '                                                                         R.sub.3 '                                                                         R.sub.4 '                                                                         R.sub.5 '                               __________________________________________________________________________     F.sub.1 -6                                                                          2, 7 positions                                                                         4-F H  H   H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -7                                                                          2, 7 positions                                                                         4-F H  H   H  CF.sub.3                                                                          H  H  CF.sub.3                                                                          H                                       F.sub.1 -8                                                                          2, 7 positions                                                                         3-F H  5-F H  CF.sub.3                                                                          H  H  H  H                                       F.sub.1 -9                                                                          2, 7 positions                                                                         3-F H  6-OH                                                                               H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -10                                                                         2, 7 positions                                                                         4-Cl                                                                               H  H   H  H  CF.sub.3                                                                          Cl H  H                                       F.sub.1 -11                                                                         2, 7 positions                                                                         3-Cl                                                                               H  6-Cl                                                                               H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -12                                                                         2, 7 positions                                                                         4-Br                                                                               H  H   H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -13                                                                         2, 7 positions                                                                         4-Br                                                                               H  5-Br                                                                               H  H  H  CF.sub.3                                                                          H  H                                       F.sub.1 -14                                                                         2, 7 positions                                                                         4-Br                                                                               3-Br                                                                              6-Br                                                                               H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -15                                                                         2, 7 positions                                                                         4-I H  H   H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -16                                                                         2, 7 positions                                                                         4-I H  H   H  CF.sub.3                                                                          H  H  CF.sub.3                                                                          H                                       F.sub.1 -17                                                                         2, 6 positions                                                                         4-Cl                                                                               H  H   H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -18                                                                         3, 6 positions                                                                         2-Cl                                                                               H  7-Cl                                                                               H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -19                                                                         3, 6 positions                                                                         4-Br                                                                               H  H   H  H  H  CF.sub.3                                                                          H  H                                       F.sub.1 -20                                                                         3, 6 positions                                                                         4-I H  H   H  Cl H  H  CF.sub.3                                                                          H                                       F.sub.1 -21                                                                         2, 5 positions                                                                         3-Br                                                                               H  H   H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -22                                                                         1, 8 positions                                                                         3-Cl                                                                               H  H   H  H  CF.sub.3                                                                          H  H  H                                       F.sub.1 -23                                                                         2, 7 positions                                                                         4-Br                                                                               H  H   H  H  H  H  CF.sub.3                                                                          H                                       F.sub.1 -24                                                                         2, 7 positions                                                                         4-I H  H   H  H  CF.sub.3                                                                          H  H  Cl                                      __________________________________________________________________________      ##STR121##      [wherein, A represents the following coupler;      ##STR122##

wherein Y represents a substituted or unsubstituted aromatic group;

R₁ represents a hydrogen atom or one of the following 4 substituted or non-substituted groups; namely,

an alkyl group, an amino group, a carbamoyl group, a carboxy group pr the ester groups thereof and a cyano group;

R₂ represents one of the following 3 groups; namely, an alkyl group, an aralkyl group and an aryl group;

Q₁ represents ##STR123## or an oxygen atom;

Q₂ and Q₃ represent each a hydrogen atom, a cyano group, an alkyl group, a substituted or unsubstituted aromatic group, a halogen atom, a vinyl group, an acyl group or an ester group, provided, Q₂ and Q₃ may be linked to other atomic group so that a ring may be formed;

P₁ and P₂ represent each a hydrogen atom, a halogen atom, a methyl group or a methoxy group.] ##STR124##

(wherein X represents a halogen atom, a nitro group, a cyano group, an acyl group or a carboxy group; n is an integer of 0 to 4; and m is an integer of 0 to 6.) ##STR125##

(wherein X₁, X₂, X₃ and X₄ represent independently H, Cl or Br; and n, m, l and k represent independently an integer of 0 to 4.) ##STR126## 

What is claimed is:
 1. An electrophotographic photoreceptor comprising: an electroconductive support provided thereon, a photosensitive layer containing a compound represented by formula I,wherein, R¹, R², R³ and R⁴ represent each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, Ar¹ and Ar² represent each ##STR127## wherein R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, R²², and R²³ represent each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a halogen atom, ##STR128## wherein R²⁴ and R²⁵ represent each an alkyl group, an aralkyl group or a phenyl group, --OR²⁸ wherein R²⁶ represent an alkyl group, an aralkyl group or a phenyl group, a hydroxyl group, an aralkyl group, a phenyl group, --R²⁷ COOR²⁸ wherein R²⁷ represents an alkylene group and R²⁸ represents an alkyl group, --COOR²⁹ wherein R²⁹ represents an alkyl group, --R³⁰ COOR³¹ wherein R³⁰ represents an alkylene group and R³¹ represents an alkyl group, or --OCOR³² wherein R³² represents an alkyl group; when Ar¹ represents ##STR129## and Ar² represents ##STR130## wherein R and R' each represents an alkyl group having 1 to 4 carbon atoms, n is 1 and m is 0 or 1; Ar¹ and Ar² each is not phenyl group non-substituted, at the same time.
 2. The electrophotographic photoreceptor of claim 1, wherein Ar¹ represents ##STR131## Ar² represents ##STR132##
 3. The electrophotographic photoreceptor of claim 2, wherein R represents a methyl group.
 4. The electrophotographic photoreceptor of claim 2, wherein n is 1, and m is
 0. 5. An electrophotographic photoreceptor comprising an electroconductive support provided thereon, a photosensitive layer having a binder and a compound selected from the group consisting of formulae I, II and III, ##STR133## wherein R₁, R₂, R₃, R₄ and R^(x) each represents an alkyl group having 1 to 4 carbon atoms, ##STR134## wherein R¹, R² and R³ represent each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, ##STR135## wherein R¹ represents an alkyl group having 2 to 4 carbon atoms, Ar¹ and Ar² represent each ##STR136## wherein R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹ R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷ R¹⁸, R¹⁹ and R²⁰ represent each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a halogen atom, ##STR137## wherein R²¹ and R²² represent each an alkyl group, an aralkyl group or a phenyl group,--OR²³ wherein R²³ represents an alkyl group, an aralkyl group or a phenyl group, a hydroxyl group, an aralkyl group, a phenyl group, --R²⁴ COOR²⁵ wherein R²⁴ represents an alkylene group and R²⁵ represents an alkyl group, --COOR²⁶ wherein R²⁶ represents an alkyl group, --R²⁷ OCOR²⁸ wherein R²⁷ represents an alkylene group and R²⁸ represents an alkyl group, or --OCOR²⁹ wherein R²⁹ represents an alkyl group; when Ar¹ represents ##STR138## and Ar² represents ##STR139## wherein R and R' each represents an alkyl group having 1 to 4 carbon atoms, n is 1 and m is 1 or 0; Ar¹ and Ar² each is not phenyl group non-substituted, at the same time.
 6. The electrophotographic photoreceptor of claim 5,wherein Ar¹ represents ##STR140## and Ar² represents ##STR141## wherein R and R' each represents an alkyl group having 1 to 4 carbon atoms, and n is 1 and m is
 0. 7. The electrophotographic photoreceptor of claim 5, the compound is ##STR142## 